Our manufacturing process features two specialized production routes to meet different requirements: CNC machining for complex custom parts and cold forming for high-volume standard fasteners. Both routes adhere to strict quality standards and deliver consistent precision.
CNC Machining Process
Precision manufacturing for complex custom parts
Material Selection
Raw MaterialHigh-quality bar stock or forged blanks prepared for precision machining. Material certification verified to ensure consistency and mechanical properties.
- Steel, Stainless Steel, Aluminum
- Certified material traceability
CNC Turning
Machining5-axis CNC turning centers produce complex cylindrical components with exceptional precision. Automated bar feeders enable continuous production.
- Max Diameter: 200mm
- Tolerance: ±0.01mm
Drilling & Tapping
Secondary OpPrecision hole drilling and internal threading for threaded fasteners and assembly components with consistent thread quality.
- Thread Range: M1–M20
- High-speed synchronous tapping
Finishing
Surface TreatmentDeburring, polishing, and surface refinement deliver smooth edges and precise finishes ready for final inspection.
- Surface Refinement
- Deburring & Polishing
Quality Control
Final Inspection100% dimensional inspection and CMM verification ensure every component meets strict tolerance specifications before shipment.
- 100% Dimensional Inspection
- CMM Verification
Factory Overview
Tooling Management
CNC Production Line
Turn-Mill Center
Cold Forming Process
High-volume production for standard fasteners
Material Preparation
Raw MaterialWire rod cutting, straightening, and surface cleaning to prepare materials for optimal cold forming conditions.
- Wire Diameter: 1.6–24mm
- Automatic coil feeding
Cold Heading
Primary FormingMulti-station cold headers form the head and shank at high speed, preserving material grain flow for superior tensile strength.
- 4–6 Station Headers
- Up to 300 pcs / min
Thread Rolling
Secondary OpPrecision thread formation using flat or planetary dies displaces material rather than cutting it, increasing tensile strength by up to 30%.
- Range: M1.6–M20
- Strength Increase: +30%
Heat Treatment
Material PropertyQuenching and tempering in continuous mesh belt furnaces for optimal mechanical properties with precise temperature control.
- Temperature: 850–950°C
- Control: ±5°C
Surface Treatment
ProtectionElectroplating, Dacromet, Zn-Ni coating, or black oxide for corrosion resistance. All coatings meet RoHS and REACH standards.
- 6+ Coating Options
- RoHS & REACH Compliant
Quality Control
Final Inspection100% optical sorting, dimensional measurement, and material verification ensure consistent quality for every fastener produced.
- CMM & Optical Sorting
- 100% Inspection Rate
Cold Heading
Thread Rolling
Heat Treatment
Stainless Steel Coils
Carbon Steel Coils
Key Manufacturing Technologies
Advanced techniques for superior fastener quality
Cold Forming Technology
Multi-station cold heading machines form fastener heads and shanks at high speed. This process preserves material grain flow, resulting in superior tensile strength compared to machined parts.
Thread Rolling Process
Thread rolling produces stronger threads by displacing material rather than cutting it. This cold working process increases tensile strength by up to 30% compared to cut threads.
Precision CNC Machining
5-axis CNC turning centers produce complex geometries with ±0.01mm tolerance. Automated bar feeders enable continuous production for custom and specialized fastener designs.
Heat Treatment
Continuous mesh belt furnaces provide precise heat treatment with temperature control within ±5°C. Quenching and tempering processes ensure optimal hardness and ductility.
Surface Treatment
In-house electroplating lines offer multiple coating options including Dacromet, Zn-Ni, black oxide, and PTFE. All coatings meet RoHS and REACH environmental standards.
Automated Inspection
Optical sorting machines and CMM inspection ensure 100% quality control. Vision systems detect dimensional defects, surface flaws, and missing features with 0.001mm precision.
Quality Control System
Stringent quality checks at every production stage
Incoming Material QC
Raw material certification, chemical composition analysis, and dimensional verification before production.
In-Process Inspection
Real-time dimensional monitoring, SPC data collection, and tool wear tracking during machining and forming.
Heat Treatment QC
Hardness testing, microstructure analysis, and mechanical property verification after thermal processing.
Final Inspection
100% optical sorting, full dimensional measurement, and traceable documentation before shipment.
Need Custom Manufacturing Solutions?
Our engineering team can develop specialized manufacturing processes for your unique fastener requirements. Contact us to discuss your project specifications.