FAQ

Standard catalog items have no MOQ — you can order as few as you need for prototyping or trial assembly. For custom-manufactured parts, MOQ depends on the manufacturing process: cold-headed parts typically start at 5,000–10,000 pcs, CNC-machined parts from 500 pcs. We strongly encourage a trial order (100–500 pcs) to verify fit, finish, and performance before committing to production volumes.

Pricing has three primary drivers: (1) material grade — stainless and titanium cost significantly more than carbon steel; (2) surface treatment — Dacromet and DLC add more cost than zinc plating; (3) order quantity — we operate a tiered pricing model. Typical breaks are 1K / 5K / 20K / 100K pcs. For annual volumes exceeding 500K pcs, we can negotiate a framework agreement with locked-in pricing. Request a quotation with your target annual quantity for the most competitive pricing.

1. Inquiry — Send your drawing, sample, or specification requirements. 2. Quotation — We respond within 24–48 hours with pricing, MOQ, and lead time. 3. Sample Approval — We produce pre-production samples (5–20 pcs) for your dimensional and functional verification. 4. Order Confirmation — Upon sample sign-off, we issue a Proforma Invoice (PI). 5. Production — Manufacturing with in-process QC at every stage. 6. Final Inspection & Shipment — OQC per AQL standard, then shipping with full documentation.

We accept T/T (bank wire transfer), L/C (Letter of Credit), and Western Union. Standard payment terms are 30% deposit with order confirmation, 70% balance before shipment (or against copy of shipping documents for established accounts). For long-term partners with consistent order history, we can offer Net 30 or Net 60 terms after credit review. We also support Alibaba Trade Assurance for first-time buyers who prefer platform-guaranteed transactions.

Yes, both. Samples: Ship us your reference sample and we will reverse-engineer the dimensions, identify the material and coating, and provide a matched quotation (typically 2–3 working days). Drawings: Acceptable formats are PDF, DWG, DXF, STEP, IGES, and SolidWorks (SLDPRT). PDF with key dimensions is sufficient for initial quoting; 3D files are preferred for complex geometries or tight tolerances. Include the material grade, surface treatment, and any testing requirements to get the most accurate quote.

For standard catalog items, we provide 5–10 free samples per SKU; you only cover the express shipping cost. For custom-manufactured parts, sample fees cover tooling setup and small-batch production cost. The exact fee depends on the complexity of the mold and the number of work stations involved — a simple single-die part costs less than a multi-station progressive heading with secondary operations. All sample fees are 100% refundable from your first production order. Expedited sampling (7 working days) is available for an additional fee. Express shipping for samples is typically 3–5 business days via DHL/FedEx/UPS.

Absolutely. Every customer SKU is permanently archived in our system with: technical drawing revision, process card (including machine parameters), tooling/mold ID numbers, surface treatment specification, QC inspection criteria, and batch sample retention. Before any repeat order enters production, the archived sample and documentation are retrieved and reviewed. We never change material grade, coating specification, or dimensions without your written approval. For critical specifications, we retain physical reference samples for 3 years minimum. Production tooling has a documented service life, and we proactively notify you before tools need replacement to avoid any process drift.

It depends on the manufacturing method. Cold heading + thread rolling (most common): 10,000 pcs minimum per size. CNC machining (for complex geometry or small runs): 500 pcs minimum. Screw machine / automatic lathe: 2,000 pcs minimum. The MOQ is driven by tooling amortization and process setup time. If your project has strong growth projections, we can absorb part of the tooling cost against a volume commitment.

We accept PDF, DWG, DXF, STEP (.stp), IGES (.igs), SolidWorks (.sldprt), and Parasolid (.x_t). For initial quoting, a PDF with critical dimensions (diameter, length, thread specification, head style, drive type) is sufficient. For production tooling, we need 3D data (STEP or SolidWorks preferred) and a fully-dimensioned 2D drawing with tolerances, material callout, surface treatment specification, and any special notes. We can also work from physical samples if no drawing is available — our engineering team will produce the CAD model and drawing for your approval before manufacturing.

Standard items (from existing tooling): 3–5 working days, free samples (you cover shipping). Simple custom parts (e.g., modified length/thread of existing design): 7–10 working days. Fully custom new design (new tooling required): 15–25 working days. The sample fee depends on the complexity of the mold and the number of work stations involved — a straightforward single-die heading operation costs significantly less than a multi-station progressive die with secondary threading and milling steps. We will provide a detailed sample quotation before proceeding. All sample fees are 100% refundable from your first production order. Expedited sampling (7 working days) is available for an additional fee.

Yes, we offer laser engraving, stamping, and pad printing on fastener heads. For cold-headed fasteners, a recessed logo can be integrated directly into the heading die (requires a dedicated die insert, one-time tooling cost). Laser marking is suitable for smaller quantities or when frequent design changes are expected. We can mark your brand name, property class (e.g., "10.9"), material identifier (e.g., "Ti"), or a custom code. Position, depth, and legibility are verified during pre-production sample approval.

Step 1 — Design Review: Our engineering team evaluates your drawing for manufacturability (DFM). We flag any tolerance issues, thread specification concerns, or coating compatibility risks within 48 hours. Step 2 — Tooling Design & Fabrication: Heading dies, thread rolling dies, and any secondary tooling are designed and manufactured. Step 3 — Pre-Production Sample (5–20 pcs): We produce samples, perform in-house dimensional and mechanical inspection, and ship to you with a dimensional report. Step 4 — Customer Approval: You verify fit, function, and finish. Any adjustments are made at this stage. Step 5 — Production Run: Full production with SPC process control. Step 6 — OQC & Shipment: Final inspection per AQL, packaging per your spec, and shipping with full documentation.

Minor modifications (e.g., adjusting under-head length by ±1–2 mm, changing drive recess depth) that do not require new tooling are typically free of charge. Changes that require new or modified tooling (e.g., different head diameter, different drive type, different thread pitch) will incur additional tooling costs. We always inform you before proceeding with any change that involves additional cost. This is why we emphasize getting the pre-production sample approved carefully — it locks in the final design configuration.

Standard catalog items (in stock): Ship within 2–5 working days. Standard items (make-to-order, common sizes): 10–15 working days. Custom-manufactured parts: 20–30 working days after sample approval (plus tooling fabrication time: 10–20 working days). Complex or high-volume custom orders: 35–45 working days. All lead times are confirmed at order placement. We track production progress daily and provide weekly status updates for orders exceeding 20 working days.

Yes. For stock items, rush orders can ship within 24–48 hours. For custom items with existing tooling, we offer an expedited 7–10 working day option (subject to production line availability; additional expedite fee applies). For emergency situations — such as a production line stoppage at your factory — contact us immediately and we will prioritize your order above all others. Rush service typically adds 20–30% to the unit price, depending on the overtime and priority scheduling required.

We routinely ship under FOB (Shanghai/Ningbo), CIF (to your destination port), and DAP (Delivered at Place). For customers who want a complete door-to-door solution, we can arrange DDP (Delivered Duty Paid) for most major markets (EU, USA, Japan, Australia) — this includes customs clearance and import duties. Air freight is available for urgent shipments (3–5 business days). Sea freight is standard for production volumes (15–35 days depending on destination). We work with DHL, FedEx, UPS, and TNT for express shipments. You are welcome to use your own forwarder or we can recommend our trusted logistics partners.

Standard packaging: Heavy-duty inner polybag with desiccant, packed in export-grade corrugated cartons (~15–25 kg per carton for manageable handling). Each carton is labeled with part number, description, quantity, production lot number, and your PO reference. Custom packaging available: individual blister packs, retail-ready branded boxes, compartmentalized trays, vacuum-sealed bags for marine environments, and RFID-labeled bins for automated warehouse systems. Palletization: All sea-freight shipments are palletized and stretch-wrapped unless otherwise specified. Wooden pallets are ISPM 15 heat-treated for international compliance. We can also ship in IBC containers or wire mesh bins for bulk bulk orders.

Report within 48 hours of receiving the shipment. Send us clear photos or a short video showing the damage or shortage, along with your packing list. Damaged goods: We will immediately arrange replacement production and ship at our expense (including air freight if your production line is waiting). Short shipment: Verified shortages are dispatched within 48 hours with all shipping costs covered by us. For quality issues (incorrect material, wrong dimensions, coating defect): we require an 8D problem-solving process with root cause analysis. Affected goods are replaced or credited, and we cover all associated shipping costs. We carry cargo insurance on all shipments — you are protected from the moment goods leave our factory.

Yes. We are ISO 9001:2015 certified by Bureau Veritas (BV), one of the world’s top three certification bodies alongside SGS and TÜV. Our certificate covers the design, manufacture, and sale of fasteners for bicycle and motorcycle applications. BV conducts annual surveillance audits to verify ongoing compliance. Our quality management system covers: incoming material inspection → in-process quality control (IPQC) → finished product outgoing quality control (OQC) → customer complaint and corrective action. Certificates in both English and Chinese are available on request. Many of our OEM brand customers use this certificate as part of their own supplier qualification process.

Standard with every shipment: Certificate of Conformity (COC) including dimensional inspection results, visual/appearance check, and mechanical property verification. Available on request: EN 10204 Type 3.1 material certificate with full traceability to heat number (including chemical composition by heat analysis, tensile strength, yield strength, elongation, and hardness for each production lot); third-party SGS/BV/TÜV test reports; salt spray test reports (ISO 9227 / ASTM B117). Material certificates include the mill’s heat number which traces back to the raw material supplier, providing full supply chain transparency. All documentation is delivered as searchable PDF files via email, with printed copies included in the shipment carton if requested. For OEM brand customers, we maintain dedicated quality dossiers with batch-level traceability from raw material to finished product.

Yes, we regularly send products to SGS, TÜV Rheinland, and Bureau Veritas laboratories for independent verification. Available test reports include: Salt spray / NSS corrosion resistance (ISO 9227, ASTM B117) — 24 to 1000+ hours; Tensile & hardness testing (ISO 898-1, ISO 3506) — wedge tensile, proof load, Vickers/Rockwell hardness; Hydrogen embrittlement test (ISO 15330) — critical for high-strength fasteners 10.9 and above; Chemical composition analysis by optical emission spectrometry (ASTM E415); Metallographic analysis (ISO 643) — grain size, decarburization depth, inclusion rating. Typical turnaround is 3–5 working days for routine tests, 48 hours for expedited service. In-house testing is included in our quotation. Third-party external lab testing is charged at cost or as mutually agreed with the customer.

Our products are manufactured to: ISO 898-1 (mechanical properties of carbon steel and alloy steel fasteners), ISO 3506 (mechanical properties of corrosion-resistant stainless steel fasteners), ISO 4762 (hexagon socket head cap screws), ISO 14580 (hexalobular socket head cap screws), DIN 912 / 7991 / 933 (industry reference standards). Batch consistency is ensured through: Statistical Process Control (SPC) on critical dimensions with CPK ≥ 1.33 as the production release criterion; First Article Inspection (FAI) — full dimensional inspection of the first piece every shift before batch production begins; In-process QC inspection every 2 hours; Outgoing inspection per AQL 1.0 C=0 sampling standard (or customer-specified AQL); safety-critical fasteners are 100% optically sorted (automated camera sorting machine for dimensional defects). All measuring instruments are calibrated annually by an ISO 17025 accredited laboratory with traceability to national measurement standards.

Yes, all our standard products are compliant with: RoHS 2.0 (Directive 2011/65/EU + Amendment 2015/863) — phthalates (DEHP, BBP, DBP, DIBP), lead, mercury, cadmium, hexavalent chromium, PBBs, and PBDEs are below threshold limits; REACH Regulation (EC 1907/2006) — SVHC (Substances of Very High Concern) Candidate List compliance (currently 240+ substances, updated annually); Conflict Minerals Report (CMRT) — Dodd-Frank Act Section 1502 compliance available upon request; California Proposition 65 — compliance assessment available for US-market customers. For EU shipments, a RoHS & REACH Declaration of Conformity is included with shipping documents by default. For automotive-grade motorcycle customers, we can support PPAP (Production Part Approval Process) Level 2 or 3 submission packages including PFMEA, Control Plan, MSA, and Process Flow Diagram. Additional certifications are arranged on a per-project basis — discuss requirements during the quoting phase.

Our outgoing quality target is ≤ 100 PPM (Parts Per Million) = 0.01% defect rate. For safety-critical fasteners (brake mount bolts, suspension pivot axles), the target is zero defects with 100% automated optical sorting. If a quality issue is found: Within 24 hours — we acknowledge the issue and begin investigation. Within 48 hours — we submit a preliminary 8D report with containment actions (hold remaining inventory, quarantine affected production lots). Within 5–7 working days — we complete root cause analysis (using Ishikawa/fishbone diagram and 5-Why methodology), implement permanent corrective action, and verify effectiveness. Remedy: For confirmed quality defects, we replace the entire affected batch or issue a credit. Emergency replacement shipments are sent by air freight at our cost. We can send a quality engineer to your facility for on-site support if a major batch issue occurs. All quality incidents are reviewed in monthly management meetings and fed into our continuous improvement plan, with updates to FMEA and Control Plan documentation to prevent recurrence.

A simplified decision guide: Carbon Steel (8.8/10.9/12.9) — best strength-to-cost ratio. Use for structural joints, brake caliper mounts, suspension pivots. Requires corrosion-resistant coating (Dacromet/Zn-Ni) for outdoor use. Stainless Steel A2/A4 — moderate strength with inherent corrosion resistance. A2 (304) for general outdoor fasteners (bottle cage, fender mounts). A4 (316) for marine or high-chloride environments. Note: stainless has lower yield strength than alloy steel and is prone to galling. Titanium Gr.5 (Ti-6Al-4V) — strength comparable to 10.9 steel at 40% less weight. Excellent corrosion resistance. Best for weight-critical applications (stem bolts, brake rotor bolts on high-end builds). Requires copper-free anti-seize on all threads. Costs 5–10× more than steel. Aluminum 7075-T6 — lightweight non-structural fasteners (fairing bolts, number plate mounts, cosmetic). Never use for safety-critical or load-bearing applications. For detailed data, see our Selection Guide.

Per ISO 898-1, the property class is a two-digit code. The first digit represents 1/100 of the nominal tensile strength in MPa. The second digit is the ratio of yield strength to tensile strength (expressed as 1/10). Examples: 8.8 = 800 MPa tensile / 640 MPa yield (80% ratio). 10.9 = 1040 MPa tensile / 940 MPa yield (90% ratio). 12.9 = 1220 MPa tensile / 1100 MPa yield (90% ratio). For bicycles: 8.8 is adequate for non-safety assembly (water bottle cage, fender stays, accessory mounts). 10.9 is the minimum for all safety-critical joints (brake calipers, stem bolts, suspension pivots). 12.9 is for extreme-duty applications where weight reduction through higher strength is needed — but with higher notch sensitivity and hydrogen embrittlement risk. We strongly recommend 10.9 as the sweet spot for most bicycle structural applications.

This is the single most safety-critical fastener on a bicycle. Our recommendation: Property Class 10.9 minimum, Dacromet or Zn-Ni coating, with pre-applied Loctite 243 (medium-strength thread locker). M6×1.0 thread, socket cap (DIN 912 / ISO 4762) or flanged button head depending on frame clearance. Torque to 8–10 Nm (post mount) or 6–8 Nm (flat mount) — never exceed 12 Nm on aluminum frame threads regardless of bolt strength. Critical rules: use a calibrated torque wrench (not a power tool), cross-pattern two-pass tightening, and apply a torque stripe for visual QC confirmation. For production frames, we recommend steel thread inserts (helicoil) in aluminum post-mount bosses — this significantly increases thread stripping resistance and service life. Ask about our pre-assembled brake mount bolt kits with thread locker pre-applied and color-coded packaging for your production line.

Titanium is the preferred choice for carbon fiber assemblies for three reasons: (1) galvanic compatibility — titanium has a much smaller galvanic potential difference with carbon fiber than steel, reducing the risk of galvanic corrosion; (2) weight savings — complementary to the purpose of a carbon frame; (3) lower thermal expansion mismatch with carbon compared to steel. If using steel bolts in carbon, they must have a Dacromet or Zn-Ni coating (never bare or zinc-plated steel) and an isolating washer is recommended. For either material: always use carbon assembly paste on clamping surfaces (never on threads), use a torque wrench with ±4% accuracy, and never exceed the manufacturer-printed torque value. Titanium bolts into carbon require copper-free anti-seize on threads and a flat washer to distribute the bearing load.

Our standard external thread tolerance is Class 6g per ISO 965-1, which is the universal fit for metric fasteners. Internal threads in bicycle frames are typically 6H. The 6g/6H combination provides a reliable clearance fit suitable for 99% of bicycle applications. For fasteners with heavy coatings (Dacromet >8 µm), we manufacture threads at the lower end of the 6g tolerance band or use a pre-coating adjusted gauge to ensure the post-coating thread still fits within 6g. We can supply Go/No-Go thread plug gauges with your first shipment so your incoming QC can verify thread acceptance quickly. If your frame has tight or non-standard threads, we can adjust to 6e or 6f tolerance or match a custom specification — just provide your thread requirement on the drawing. For production frames, we recommend sending us a frame insert or a tap-set sample so we can match the thread exactly. Many frame factories include this as part of their supplier qualification process.

Yes, this is one of our most requested services from assembly factories. We offer two technologies: Nylon Patch (Nylok-type) — a nylon element fused onto the thread that provides prevailing torque locking. Reusable 3–5 times. Excellent for vibration resistance. Micro-encapsulated Pre-Applied Adhesive (Precote/Dri-Loc type) — microscopic capsules of anaerobic adhesive pre-coated on threads. Activates during installation when capsules rupture. Available in low (purple), medium (blue), and high (red) strength grades. The major advantage for your assembly line: bolts arrive ready-to-install, eliminating the manual thread-locker application step and its associated mess, inconsistency, and curing wait time. This typically saves 15–30 seconds per bolt on the line — significant at production volumes. We can also do selective coating (patch only where needed, keeping the lead-in thread clean for easy starting). Minimum order for pre-applied thread locker is typically 5,000 pcs per size.

Yes, we maintain specification databases for all major bicycle component brands. Our fasteners are dimensionally compatible with: Brake mounts — Shimano IS/Post Mount/Flat Mount (M6×1.0, specific lengths); Rotor bolts — Shimano 6-bolt (M5×0.8) and Centerlock lockring (M12×P1.0 spline); Stem faceplates — standard M5/M6 spacing across most brands; Bottom brackets — BSA threaded (1.37"×24 TPI), T47, press-fit variants; Thru-axle thread — M12×P1.0, M12×P1.5, M15×P1.5 per DT Swiss/Syntace standards; Suspension hardware — Fox, RockShox, and DVO mounting hardware dimensions. We can cross-reference your component BOM against our database to confirm compatibility before quoting. If you need a fastener for a specific brand/model, just tell us the component and we will identify the correct specification.

Yes, value engineering is a core part of our technical support. Common cost-saving strategies we recommend: Replace titanium with 12.9 alloy steel + Dacromet — you gain strength, retain comparable corrosion resistance (1000+ hours NSS), and reduce cost by 70–85%. Replace A4 (316) stainless with A2 (304) + Zn-Ni coating — suitable for most non-marine applications, saving 15–25%. Consolidate bolt lengths — using one standardized length across multiple assembly locations (with acceptable grip range) reduces SKU count, tooling costs, and inventory complexity. Switch from full-body machining to cold heading — for production volumes above 10K pcs, cold heading is significantly cheaper than CNC turning. We always present the cost-performance trade-off transparently so you can make an informed decision. Note: we will never suggest a cost reduction that compromises safety or function — if the application demands a specific material, we tell you directly.

The two most common coatings, but fundamentally different technologies: Zinc Plating (Electroplating) — A zinc layer electrochemically deposited onto the steel surface. Provides sacrificial (cathodic) protection. Typically 5–10 µm thick. Passes 72–200 hours neutral salt spray (NSS). Low cost, widely available. CRITICAL LIMITATION: The electroplating process introduces hydrogen into high-strength steel, causing hydrogen embrittlement. Not suitable for property class 10.9 and above unless post-plating baking is performed. Dacromet (Zinc-Aluminum Flake Coating) — A non-electrolytic dip/spin coating containing zinc and aluminum flakes in an inorganic binder. 5–15 µm thick. Passes 480–1000+ hours NSS. ZERO hydrogen embrittlement risk — no electrolytic process, no acid pickling. This is the only safe coating for 10.9 and 12.9 fasteners. Lower friction coefficient (K ≈ 0.13–0.16), meaning lower installation torque for the same clamp load. Silver-gray matte appearance. Marginally more expensive than zinc plating, but the safety benefit for high-strength fasteners is non-negotiable.

Approximate neutral salt spray (ISO 9227 / ASTM B117) performance for each coating: Zinc Plating (clear/blue passivation) — 72–120 hours to white rust; Zinc Plating (thick passivation) — 200–300 hours; Zinc-Nickel (Zn-Ni, 12–15% Ni) — 720–1000+ hours; Dacromet / Geomet (Zn-Al flake) — 480–1000+ hours; Zinc Flake (silver, with topcoat) — 1000–1500+ hours; Black Oxide — 12–24 hours (oil-dependent, minimal standalone protection); Passivated Stainless (A2/A4) — 500–1000+ hours (inherent to material, not a coating). For bicycle applications with mixed weather exposure, we recommend Zn-Ni or Dacromet as the minimum for any steel fastener. For the EU and UK markets where bikes are ridden year-round in wet conditions, Dacromet with a topcoat is the standard specification for structural bolts.

Available color options per coating process: Dacromet / Geomet — silver-gray (standard), black (with topcoat). Matte finish. No bright colors available. Zn-Ni plating — silver (clear passivation), black (black passivation). Semi-bright to matte. Zinc plating — silver, blue, yellow, black, olive drab (passivation-dependent). Anodizing (aluminum) — wide color range (red, blue, gold, purple, green, black). Natural anodizing has inherent color variation; dyed anodizing offers much better batch-to-batch consistency. DLC (Diamond-Like Carbon) — dark gray to deep black, semi-gloss. TiN (Titanium Nitride) — gold. For color consistency: We match against a reference standard (Pantone or RAL color chart). Each production batch has a retained sample for comparison. For critical cosmetic fasteners (visible head on high-end frames), we can establish master limit samples (upper boundary, target, lower boundary) that are retained and referenced for every batch inspection. Note: metallic coating processes inherently have some color variation — if perfect cosmetic uniformity is required, painting or powder coating may be more appropriate than plating.

Hydrogen embrittlement is a delayed, catastrophic failure mode where atomic hydrogen diffuses into high-strength steel during the electroplating process, migrates to stress concentrations under the bolt head and in thread roots, and causes brittle fracture — sometimes hours or days after installation, with no visible warning. The risk increases exponentially at hardness levels above 320 HV (property class 10.9 = 320–380 HV). Zinc electroplating is the worst offender because: (1) the acid pickling step before plating aggressively generates hydrogen; (2) the electrolytic process itself generates hydrogen at the cathode (the bolt). Post-plating baking (190–210°C for 4–8 hours) can drive out some hydrogen, but it is not 100% reliable and is easy to skip or under-perform. The only truly safe option for 10.9 and 12.9 fasteners is a non-electrolytic coating: Dacromet, Geomet, or zinc flake (Zn-Al). These are mechanically applied (dip-spin-bake) with no electrolytic process and no acid pickling, resulting in zero hydrogen embrittlement risk. This is an industry-standard rule followed by automotive, aerospace, and professional bicycle component manufacturers. For more detail, see ISO 15330 (hydrogen embrittlement test method) and our Selection Guide.

Yes, coating thickness does affect thread fit — this is a real engineering consideration that we actively manage. Our approach: Pre-coating thread tolerance — For standard 6g external threads, the coating thickness allowance is built into the tolerance band. A 6g bolt with a coating up to approximately 12 µm total thickness will still mate properly with a 6H internal thread. Coating-specific management: Zinc plating (5–8 µm) and Zn-Ni (8–12 µm) fit within the 6g/6H allowance without adjustment. Dacromet (5–15 µm) — we control the dip-spin process to maintain ≤10 µm on thread flanks. For heavy coatings (>12 µm) or tight-tolerance applications, we use pre-coating adjusted gauges — the thread is manufactured with extra clearance so the finished (post-coating) thread fits within 6g. The pre-coating gauge system uses a +X go gauge where X = 2 × coating thickness. Customer verification: We can supply Go/No-Go ring gauges with your order. If your production line experiences thread fit issues, send us the mating part (frame insert, nut) and we will dial in the tolerance. Thread fit is one of the most common issues in custom fastener programs, and it is almost always solvable through proper tolerance stack-up management.

For year-round wet-weather riding: Dacromet/Geomet with an organic or inorganic topcoat is the gold standard (1000–1500+ hours NSS). The topcoat seals the base zinc-aluminum layer and adds a second barrier, plus it allows a black finish option which is preferred for most bike brands. Zn-Ni (12–15% nickel) with black passivation is a close second (720–1000+ hours NSS) and is more readily available in bright/semi-bright finishes. For bolts that thread into aluminum frames, the coating must pair with anti-seize compound — without it, even the best coating won’t prevent galvanic corrosion at the steel-aluminum interface. For the UK and Ireland specifically, where winter road salt is a major factor, we recommend A4 (316) stainless for all exposed fasteners (bottle cage, fender mounts) or Dacromet-coated alloy steel for structural bolts. Avoid black oxide entirely for wet-weather bikes — it offers almost no standalone corrosion protection.

Yes, we actively encourage long-term framework agreements. A typical agreement includes: Annual volume commitment (with quarterly or monthly call-off schedules); Price lock for 12 months (subject to raw material index fluctuations exceeding 10% — if raw material costs change significantly, we adjust with full transparency based on published indices); Guaranteed production capacity allocation — your forecasted volumes are reserved in our production schedule; Quarterly business reviews covering quality KPIs, delivery performance, cost-saving opportunities, and new product development. Framework agreements benefit both sides: you get stable supply and predictable pricing; we get production planning visibility and tooling investment confidence. Minimum annual volume for a framework agreement is typically USD 50K annually, but we are flexible for growing brands with strong projections.

Yes. We offer VMI (Vendor Managed Inventory) — we maintain a buffer stock at our facility dedicated to your account, monitored by agreed minimum/maximum levels. When stock drops to the reorder point, we automatically trigger production. This eliminates your need to manage reorder timing and significantly reduces your risk of stockouts. Consignment stock — we place inventory at your location (or a nearby 3PL warehouse). You pull stock as needed, and we invoice monthly based on actual consumption. Consignment is available for customers with established trading history and consistent consumption patterns. For export customers, we can work with your nominated freight forwarder to maintain regional hub stock in EU, US, or Japan warehouses for 48-hour delivery. This is a premium service that we tailor to each customer's specific supply chain requirements — contact our sales team to discuss.

All customers receive: Application engineering support — material grade selection, coating recommendation, torque specification, and joint design review; DFM (Design for Manufacturability) feedback — we review your drawing and flag tolerance stack-up issues, thread engagement concerns, and manufacturability risks before tooling begins; Pre-production sample evaluation — we provide a dimensional inspection report with every sample shipment; After-sales technical inquiry — fast response to any assembly, torque, or performance questions. For framework agreement customers, we add: On-site assembly line process audit (one visit per year); Custom assembly procedure documentation for your production line; Quarterly engineering review call for new product development; Access to our material testing database and comparative coating performance data. Our engineering team is the bridge between our factory and your assembly line — they understand both sides.

Absolutely. We sign NDAs as a standard business practice before reviewing any customer proprietary drawings, specifications, or designs. Our standard mutual NDA covers: Confidentiality of all technical data, drawings, specifications, and business information; Non-use — your designs will never be offered to any other customer; Term — typically 3–5 years from the date of signing; Scope — mutually binding for both parties. We are also willing to sign your company’s standard NDA if preferred. Many of our brand customers require NDA + Manufacturing Agreement before we receive their 3D CAD files for new model development. We take IP protection seriously — customer-specific tooling is segregated, and proprietary drawings are access-controlled within our engineering database. Reference samples and golden samples are stored in locked, labeled cabinets by customer.

Yes, this is one of our most valued services for assembly factories. We can consolidate your entire bicycle fastener BOM into a single-supplier assembly kit. The kit typically includes all chassis fasteners: stem bolts, brake caliper bolts, rotor bolts, chainring bolts, BB cup, derailleur hanger bolt, seatpost clamp bolt, bottle cage bolts, fender/rack eyelet bolts, and thru-axle (if within our manufacturing scope). Packaging options: By workstation — bolts grouped by assembly station (Station 1: Frame Prep, Station 2: BB/Crankset, Station 3: Cockpit, Station 4: Brakes, etc.), reducing line-side inventory and pick errors; By sub-assembly — a single sealed bag contains all fasteners for one complete sub-assembly; Full bike kit — one box contains every bolt for one complete bicycle, with a checklist inside. Each bag is labeled with part number, description, quantity, and the assembly location. This service eliminates 5–10 separate supplier relationships, simplifies receiving inspection, and ensures that every bolt on the bike is correctly specified and compatible. Kit assembly is charged at a small premium over bulk pricing, reflecting the picking, kitting, and verification labor. Contact us with your BOM for a kit quotation.