Aluminum Frame OEM Hardware
PremFixer manufactures drawing-defined fasteners, precision turned components and selected frame inserts for aluminum bicycle OEM programs. Coordinate weld-on frame fittings, threaded inserts, pivot hardware, hanger fixing parts and other agreed assembly fasteners against your approved frame drawings and BOM—from frame production inputs to final bicycle assembly.
Continue through assembly.Existing pivot hardware configuration; each component retains its own drawing and quantity.Explore pivot supply →
01 / Plan the receiving stage
Start with the approved frame drawing and model BOM. These are illustrative procurement stages; the frame plant determines the actual installation sequence, receiving condition and inspection points.
Review suitable aluminum weld-on bosses, mounting tabs and frame fittings against the base alloy, joint geometry and approved welding and post-weld process.
Weld-on fittings & bottle / rack bosses →Define before orderingBase alloy · approved joining route · weld location · delivery condition
Review mechanically retained inserts and mounting pieces with the hole, wall, finish and local load path. Confirm who installs them and whether the parts arrive loose or as an agreed subassembly.
Threaded inserts & mounting interfaces →Define before orderingHole and wall condition · retention · protected surfaces · installer
Group pivot hardware, hanger fixing parts, drivetrain fasteners and accessory hardware by frame model and assembly station. Include only the items assigned to this order.
Build the model hardware BOM →Define before orderingPart number + revision · quantity · packing group · supply owner
One frame, several materials.Specify each part separately.
Joining follows the design.A catalog name is not an installation instruction.
Finished interfaces matter.State masking, thread protection and coating allowances.
Installation has an owner.Frame fabrication and vehicle validation remain with the responsible factory or brand.
02 / Define the component before the joining method
Frame-mounted hardware needs a defined material, geometry and installation route. A PS-E catalog reference can help describe a shape; it does not qualify that part for every alloy frame or joining process.
PS-E16 original drawing
PS-E16 / source 546-101-130. The drawing shows a flanged, ribbed body and M5 thread. It does not state an alloy or approve a retention method.
The frame builder defines a suitable base-metal combination, joint design, filler, heat input and post-weld condition. Confirm machining faces, seat geometry and how the threads will be protected during fabrication.
PremFixer scope: review and manufacture the agreed component. Frame welding, heat treatment and frame validation require the responsible manufacturer's approved process.
A steel or stainless insert requires a separately approved retention design. Review the hole, tube wall, installation force, anti-rotation feature, pull-out requirement and local load path. Pressed, riveted and threaded installations are distinct options.
Corrosion review includes metal contact, exposure, protective finish, isolation and assembly condition; no universal pull-out rating or corrosion-free claim applies.
For supplied-loose threaded mounts or other fittings, identify the part drawing, material, installation owner and receiving stage. Mark the finished thread, seating face and label identity that the next workstation must receive.
03 / Full-suspension frame assemblies
An aluminum full-suspension frame may use several pivot joints with different axle, sleeve and spacer geometries. The approved assembly drawing identifies the bearing contacts, shoulder positions, retained components, threads and installation side.
Specify the pivot axle, shoulder bolt, sleeve, spacer and retaining nut as separate items. Review the clamping path through the intended contact faces, tool access and fit after finishing. Loads, torque and functional acceptance come from the design owner.
A hardtail does not normally need rear-suspension pivot hardware. Select the applicable joints for the actual model.
PS-P04 shaft drawing This original shaft drawing is a separate technical reference for shoulders, threads and flats. It is not the drawing for the photographed set above. Cross-reference each purchased part to its own approved drawing and mating assembly.
Review precision turning & turn-mill manufacturing →04 / Rear frame interface
Define the seat, frame-end thickness, thread engagement, axle-to-hanger position and tool access against the OEM revision. Conventional hanger assemblies, UDH and Full Mount have different component requirements; a familiar-looking bolt does not establish compatibility.
PS-K12 dropout drawing 
These are independent catalog references, not a verified bolt-and-nut pair. Require the same approved thread interface and clamp stack before quoting a matched set.
Full Mount attaches directly at a compatible frame interface instead of using the UDH hanger. Use the current frame and drivetrain documents, including SRAM's architecture guide, for the required arrangement.
05 / Confirm the assembly purchasing scope
Chainring hardware belongs in the frame program only when the agreed BOM assigns it to this order. A crankset or drivetrain supplier may already supply these parts.
The specific crank and chainring arrangement determines bolt and nut geometry, engagement, clamped thickness, material and quantity. Crank fixing bolts, direct-mount systems and lockrings are separate requirements.
Review Assembly Hardware Scope
For e-bike programs, identify the external motor or battery mounting version. Cells, battery electrical design and drive-unit internals are outside this mechanical hardware scope.
06 / Procurement decisions
An aluminum frame does not require every fastener to be aluminum. Select materials per component, then review joining, corrosion exposure and the final functional surfaces.
| Frame / component condition | Review first | Include in the RFQ |
|---|---|---|
| 6061 or 7005 frame | Boss base metal, welding procedure and required post-weld condition | Frame alloy and approved fabrication procedure |
| Aluminum weld-on fitting | Alloy compatibility, joint design and finishing sequence | Part alloy / condition, joining specification and delivery stage |
| Steel or stainless insert | Mechanical retention and corrosion protection | Installation method, hole and wall conditions, load criteria |
| 7075 / 6061 machined hardware | Part temper, loading, contact surfaces and fit | Approved part drawing, material condition and finish |
| Painted or anodized frame | Finished holes, threads, mating faces and protection | Receiving condition, masking and finished dimensions |
Welding changes the material condition.Do not apply unwelded 6061-T6 properties to a welded joint without qualification. The frame maker defines the heat-treatment route and acceptance requirements for its 6061 or 7005 structure. 7075 is a possible machined-part material, not a default weld-on boss choice. ESAB explains alloy and welding considerations.
Review the completed interface.Thin-wall insert retention, coating allowance, galvanic exposure and assembly load need project-specific decisions. Thread size or alloy name alone cannot determine installation torque or fatigue life. Explore the materials guide and the existing aluminum-frame systems overview; approved project documents govern selection.
07 / One procurement register, separate responsibilities
Keep each drawing number, revision and supply owner visible. Separate frame-factory items, brand-specified components, drivetrain-supplied parts and the components PremFixer is asked to manufacture.
Illustrative structure only — not a real customer order or an approved specification. Scroll horizontally on small screens to compare all fields.
| Example Part No. | Stage / Location | Component | Material / Route | Drawing Rev. | Qty per Frame | Supply Responsibility |
|---|---|---|---|---|---|---|
| EX-F01 | Frame fabrication | Weld-on aluminum boss | Approved aluminum joining route | A | Per approved BOM | Part manufacture; installation by frame plant |
| EX-F02 | Frame interface | Threaded mechanical insert | Drawing-defined post-fabrication fixing | B | Per approved BOM | Part manufacture |
| EX-P01 | Assembly / pivot | Pivot axle | Approved part drawing | A | Per approved BOM | Part manufacture |
| EX-P02 | Assembly / pivot | Mating sleeve | Approved part drawing | B | Per approved BOM | Part manufacture |
| EX-H01 | Rear dropout | Hanger fixing bolt | Approved part drawing | A | Per approved BOM | Part manufacture |
| EX-H02 | Rear dropout | Mating threaded piece | Drawing-specific | A | Per approved BOM | Part manufacture if included |
| EX-C01 | Drivetrain | Chainring bolt or nut | Crank / chainring-approved drawing | C | Per approved BOM | Confirm supplier responsibility |
| REF-B01 | Assembly | Bearing or seal | OEM reference | — | Per approved BOM | Reference only unless agreed |
Count parts against the actual configuration.Each drawing keeps its own quantity. List samples and spares separately, and distinguish pieces, pairs and sets. Different frame sizes or model revisions may change only selected lines; do not assume a fixed pairing ratio.
Quote the agreed manufacturing scope.Identify customer-supplied and reference-only items before sampling. A kit label does not include every visible bearing, seal, crank component or accessory. Compare this frame-stage register with the broader Bicycle OEM program or MTB assembly hardware kits.
08 / Component manufacturing and acceptance
The part drawing determines the manufacturing route. CNC work, forming, threading and tooling are selected operations; every part does not pass through one identical process chain.
Confirm drawing revision and material, internal threads and anti-rotation features, fitting contact faces, shaft / sleeve dimensions and critical dimensions after finishing. Agree inspection records and packing labels with the order.
Review quality control →PremFixer supplies the agreed manufactured parts. The responsible frame plant or brand approves structural changes, weld quality, frame fabrication and bicycle-level functional validation. Partner operations and documentation are defined in the quotation.
Review multi-part manufacturing responsibility →
Original ISO 9001 certificate ↗Guangdong Pinshang Hardware Products Co., Ltd.
Bureau Veritas Certification · F02326Q00193R002 / CN059955
28 April 2026–27 April 2029, subject to continued satisfactory operation and monitoring.
Certified scope: Production of hardware screws and nuts. This management-system certificate is not approval of every frame fitting, welded structure or complete bicycle.
Read the certification record →09 / From initial list to repeat order
Manufacturing feedback helps resolve part-production questions. It does not authorize changes to the frame's load-bearing design.
10 / Engineering and sourcing questions
An agreed project can include drawing-defined weld-on frame fittings, threaded mounting components, pivot bolts, axles, sleeves, spacers, hanger fixing parts and other bicycle assembly fasteners. The frame and model BOM determine which items are supplied. A component visible in an assembly drawing is not automatically included in the quotation or manufactured by PremFixer.
A weld-on boss is designed for integration using the frame builder’s approved joining process, with its alloy and geometry matched to the frame. A threaded insert may use a separate mechanically retained, pressed, riveted or otherwise approved installation method. The names can overlap in a product catalog, so the material and installation method must be specified in the project drawing.
Conventional TIG fusion welding is not an interchangeable joining method for steel and aluminum. Direct joints can form brittle intermetallic compounds and require specialized engineering. A stainless or steel threaded insert for an aluminum frame should therefore have its joining or retention method reviewed separately. We manufacture the drawing-defined component; the frame maker approves and validates its installation process.
Aluminum weld-on fittings can be discussed against the frame drawing, base alloy, joint design and approved fabrication process. The frame manufacturer should define the joining procedure and any required post-weld treatment. We review the part geometry, material and machining requirements as an OEM component order; this does not mean that PremFixer welds or validates the complete frame.
No. A product family label is not a substitute for a production specification. Similar-looking bosses or inserts can use different materials and installation methods depending on the frame and the intended joining stage. Please identify the exact part drawing, frame material and required retention or joining process before selecting a reference from the PS-E library.
Yes. Frame material and fastener material are separate design decisions. A project may specify different grades for weld-on aluminum fittings, CNC-turned axles, threaded inserts or other mounting parts. Each BOM line should state its approved grade, condition, finish and functional surfaces. Different metals in contact also require a project-specific corrosion and assembly review.
Yes. Our manufacturing range includes custom fasteners and precision turned parts such as pivot axles, shoulders, sleeves, spacers and mating locking components. A hardware set must be defined by the approved joint or assembly drawing. Bearing-contact dimensions, axial stack, threads and required per-frame quantities are established for each location rather than inferred from a reference product photo.
We can manufacture drawing-defined bolts, nuts and threaded parts for approved hanger or dropout assemblies. The frame-end geometry, seat, clamp thickness and retention method must be known. Traditional hangers, SRAM UDH and Full Mount interfaces are not automatically interchangeable, so the drawing and the drivetrain architecture must define what is required.
Only if the agreed project BOM includes them. Chainring hardware may be specified and purchased with a crankset or another drivetrain assembly rather than with the bare frame. The required bolt, mating nut or barrel and quantities depend on that specific mounting arrangement. Direct-mount or lockring interfaces and crank fixing bolts are separate requirements.
The installation stage depends on the part design and the frame maker’s manufacturing plan. Weld-on aluminum fittings, mechanically retained inserts and after-paint mounting fasteners can have different sequencing and finished-surface requirements. The frame factory should identify the installation stage, the condition of the frame and any necessary masking, protection or inspection in its approved procedure.
Yes, within the agreed drawing and manufacturing scope. A hardtail normally does not require rear-suspension pivot hardware, while a full-suspension design may include multiple pivot and shock mounting assemblies. Bottle bosses, hanger fixing and other frame hardware also vary by model. We organize the quotation by actual frame configuration and approved BOM rather than one universal kit.
You can start with frame drawings, a preliminary hardware list, sample photos or a draft BOM. Include the frame alloy, model or platform, estimated quantities and the manufacturing or assembly stage for the requested components where known. The detailed drawing revision, material and finish specifications, installation responsibility and acceptance criteria are confirmed before release to production.
Packing can be arranged by part number, subassembly, frame model or workstation as agreed for the order. The item list should define the included components, quantities, drawing revisions and labels. A model-specific hardware supply program does not automatically mean a sealed retail pack for every bicycle. Reference-only or customer-supplied items remain excluded unless explicitly quoted.
No. ISO 9001 certifies the quality management system within the scope stated on the certificate; it does not establish universal compatibility, structural weld approval or vehicle-level safety validation. The frame manufacturer and design owner define and approve the application. Individual parts are manufactured and inspected according to the agreed drawings, materials and project acceptance requirements.
Start with the information you have
Share your frame or model reference, the drawings or BOM you currently have, and the quantities required for your project. Identify which fittings are installed during frame fabrication and which fasteners are supplied for final assembly. We will clarify the part-by-part manufacturing and supply scope with you.
Start with contact details and a brief project description. Drawings, frame alloy, installation stage and BOM details can follow as they become available.
