Our Production Workshops & Equipment
Three professional workshops including cold forging, threading and CNC machining are fully equipped with over 80 sets of precision machines, covering fastener production from forming, threading to customized CNC processing, supporting standard and non-standard bolt & nut manufacturing.
Cold Heading Workshop
Equipment: 14 bolt forming machines, 16 nut forming machines
Processing Range: Bolts M4–M16, Nuts M4–M20
Threading Workshop
Equipment: 12 thread rolling machines, 17 tapping machines
Processing Range: Thread rolling M3–M14, Tapping M4–M14
CNC Machining Workshop
Equipment: 40 CNC lathes
Processing Range: Custom sizes available
Production & Testing Capacity
Three professional workshops including cold forging, threading and CNC machining are fully equipped with over 80 sets of precision machines, covering fastener production from forming, threading to customized CNC processing, supporting standard and non-standard bolt & nut manufacturing.
Sorting Workshop
Equipment Quantity: 16 sets of optical image sorting machines
Processing Specification: Length less than 150 mm
Inspection Center
Equipment Quantity: Hardness testers, spectrometers, tensile testing machines, etc.
Processing Specification: No limit
Finished Product Workshop
Warehouse Location Quantity: 1,500 storage bins
Processing Specification: No limit
Products You Need
High-strength automotive fasteners, including non-standard bolts, nuts and pins
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Standard Weld Nuts
Specifications: M5-M12 Performance Grade: Class 6 to Class 10 Function: Widely used for fastening connections in automotive interior structures.
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Non-standard Weld Nuts
Specifications: M5–M12 Performance Grade: Class 6 to Class 10 Function: Widely adopted for fastening connections in various functional and structural parts of automotive interiors.
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Standard Bolts
Specifications: M5 – M24 Mechanical Grade: Class 4.8 to Class 12.9 Function: General fasteners manufactured in accordance with GB, automotive, American, German and Japanese standards. Widely used for fastening connections in structures of automobiles, electrical cabinets, power equipment, machinery, electronics, electrical appliances, ships and other fields.
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Anti-Loosening Coated Bolts
Specifications: M3 – M12 Mechanical Grade: Class 4.8 to Class 12.9 Function: Widely used for anti-loosening threaded connections in structural assemblies of automobiles, electrical equipment, power facilities, machinery, electronics and household appliances. Available coating types include NYLOK®, Precote®, 3M®, ND® and Loctite®, all complying with standards such as DIN-267 PART 27, IFI-125 and WX200.
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Various Special-shaped Bolts
Specifications: M5 – M12 Mechanical Grade: Class 4.8 to Class 12.9 Function: Widely applied for fastening connections on diverse functional and structural components of automotive interior and exterior.
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Weld Bolts
Specifications: M5 – M12 Mechanical Grade: Class 4.8 to Class 10.9 Function: The design of welding spots and threads varies to match different welding processes and structural positions. Low-carbon alloy steel is adopted as raw material. After heat treatment, the parts obtain high strength and excellent weldability.
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Screws
Specifications: M4–M16 Mechanical Grade: Class 4.8 to Class 12.9 Function: Widely used for connecting automotive interior and exterior components. Drives for assembly are categorized into internal drive and external drive. We can produce standard bolts and high-strength bolts according to different assembly requirements: Standard bolts (grade below 8.8) are reusable; High-strength bolts (grade 8.8 and above) are non-reusable and generally…
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Rivets
Specifications: Φ3mm – Φ20mm Mechanical Performance: Customized as per specific requirements Function: Commonly used for fastening and connecting non-detachable structures of automotive interior and exterior. They are required to possess excellent toughness to facilitate riveting, as well as certain tensile and shear strength, to guarantee the safety of structural components under applied loads.
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Self-tapping Screws
Specifications: ST series, NST series, PF series, PT-H series, PT-K series, TP series Mechanical Performance: Carburizing heat treatment, quenching & tempering heat treatment Function: Widely used for fastening thin metal sheets and plastic workpieces of automotive interior and exterior parts. They feature excellent self-tapping performance and superior anti-loosening capacity.
Senyi Fasteners
Zhejiang Senyi Fasteners Co., Ltd.