Chaojie Fasteners (Shanghai) Co., Ltd.

The company produces a wide range of conventional bolts, nuts and bushings, mainly applied to automotive seat, wiper and shock-absorber systems. Formed by cold heading, the materials cover cold-headed carbon steel, stainless steel and alloy steel, with surface treatments including zinc-nickel alloy, eco-friendly zinc plating and pickling/passivation, meeting the general fastening needs of body and interior/exterior trim systems of both conventional fuel vehicles and new energy vehicles.

Grade: 8.8-12.9; Size range: M4-M24; Material: cold-headed carbon steel/stainless steel/alloy steel; Surface treatment: zinc-nickel alloy/eco-friendly zinc plating/pickling-passivation

• Automotive seat systems
• Wiper systems
• Shock-absorber systems
• Automotive interior and exterior trim
• New energy vehicle bodies

Combining cold heading with precision machining, the company manufactures valve covers, housings, connecting shafts, sealing plates, connectors and similar parts, which are widely used in key automotive positions such as motors and transmissions. Materials include cold-headed carbon steel, stainless steel, copper and aluminum, with surface treatments covering zinc-nickel alloy, eco-friendly zinc plating, pickling/passivation and anodizing to meet demands for high dimensional accuracy and multi-material combinations.

Machining accuracy: ±0.01mm; Tolerance class: IT6-IT8; Material: cold-headed carbon steel/stainless steel/copper/aluminum; Surface treatment: zinc-nickel alloy/eco-friendly zinc plating/pickling-passivation/anodizing

• Automotive motors
• Transmission systems
• Valve covers and housings
• Connecting shafts and connectors

Valve stem assemblies, connecting links, heat-resistant bushings and heat-resistant bolts developed for engine turbocharging systems, capable of long-term service in high-temperature environments. Materials are selected from low-carbon cold-headed steel, copper, stainless steel and alloy steel, with surfaces treated by zinc-aluminum coating, zinc-nickel alloy, eco-friendly zinc plating and pickling/passivation to enhance heat and corrosion resistance.

Temperature resistance: up to 650°C; Grade: 10.9-12.9; Material: low-carbon cold-headed steel/copper/stainless steel/alloy steel; Surface treatment: zinc-aluminum coating/zinc-nickel alloy/eco-friendly zinc plating

• Engine turbocharging systems
• Valve stem assemblies
• Connecting links
• Heat-resistant bushings and bolts

Weld bolts, weld nuts, arc-welded studs and sleeves produced by the company are mainly applied to automotive chassis systems, being reliably joined to sheet-metal parts by capacitor-discharge welding or arc welding. Materials are mainly cold-headed low-carbon steel and alloy steel, mostly finished with zinc-nickel alloy or eco-friendly zinc plating.

Grade: 8.8-10.9; Welding method: capacitor-discharge welding/arc welding; Size range: M5-M16; Material: cold-headed low-carbon steel/alloy steel

• Automotive chassis systems
• Body welding structures
• Weld studs

Sensor adjustment nuts, connecting rods and fasteners developed for automotive exhaust systems using the cold extrusion (cold heading) process, offering a low-cost process optimization solution. Materials include stainless steel, heat-resistant steel, low-carbon cold-headed steel and alloy steel, with surface treatments such as pickling/passivation, eco-friendly zinc plating and molybdenum disulfide.

Forming process: cold extrusion (cold heading); Temperature resistance: up to 800°C; Grade: 8.8-12.9; Material: stainless steel/heat-resistant steel/low-carbon cold-headed steel/alloy steel

• Automotive exhaust systems
• Sensor adjustment bases
• Connecting rods and fasteners

Products used for connecting and fastening automotive plastic and metal components, including headlamp adjustment ball studs and adjustment levers, as well as self-tapping screws for thermoplastic fastening and metal self-tapping self-locking screws and bolts. Materials are cold-headed low-carbon steel, stainless steel and alloy steel, with zinc-aluminum coating, zinc-nickel alloy and eco-friendly zinc plating treatments.

Grade: 8.8-10.9; Thread type: self-tapping/self-locking; Size range: M3-M10; Material: cold-headed low-carbon steel/stainless steel/alloy steel

• Automotive headlamps
• Mirrors and interior/exterior trim
• Plastic/metal component joining

Fastening and connection products developed for the battery swap systems of new energy vehicles, including grade 8.8, 10.9 and 12.9 high-strength screws and bolts, weld bolts and nuts, self-tapping self-locking screws, etc., applied to the connection and fastening of battery packs and swap modules. This series is the battery swap system fasteners officially disclosed by the company and has been applied in volume by leading NEV manufacturers and battery swap operators.

Grade: 8.8/10.9/12.9; Material: cold-headed low-carbon steel/stainless steel/alloy steel; Surface treatment: zinc-aluminum coating/zinc-nickel alloy/eco-friendly zinc plating; Application module: battery pack/battery swap

• NEV battery swap systems
• Battery trays
• Battery pack connection assemblies

Highly customized plastic products developed and produced by the wholly-owned subsidiaries (Shanghai Yikou, etc.) for the automotive, communication and electronic/electrical industries. The product categories include high-strength plastic functional parts and plastic fasteners, such as automotive pipe clamps, tees, connectors, check valves, quick-connect fittings, built-in pipe silencers and cable-tie fasteners.

Material: PA/PP/POM engineering plastics; Forming process: injection molding; Operating temperature: -40°C to 120°C; Flammability rating: UL94-HB/V0 (typical)

• Automotive piping systems
• Communications
• Electronic and electrical equipment

The company has long been engaged in the R&D, production and sales of high-strength precision fasteners and special-shaped connection parts, with deep expertise in critical irregular automotive connectors, combining cold heading, precision machining and injection molding to enrich its product range. According to the 2026 interim report, special-shaped connection parts generated revenue of RMB 81.2906 million, accounting for 20.02% of the company's main products, making it one of the core product series.

Revenue share: 20.02% (2026 interim report); Forming processes: cold heading/precision machining/injection molding; Grade: 8.8-12.9; Material: cold-headed carbon steel/stainless steel/alloy steel/engineering plastics

• Engine turbocharging
• Gear shifting and parking control
• Exhaust systems
• Interior and exterior trim
• Chassis and body
• Electronics and electrical
• Communications