tianhong Customized High-quality multi-series hex socket bolts
High-quality multi-series bolts including carriage bolts, hex socket carriage bolts, hex socket cylinder head screws and torx cylinder head hollow...
High-precision, durable fasteners including shafts, cotter pins and contact pins, made of high-quality materials with customizable specifications, suitable for various industrial fields such as electronics, auto parts and renewable energy, ensuring stable connection, precise positioning and reliable performance.
Zhejiang Tianhong’s core fasteners—shafts, cotter pins and contact pins—are vital for mechanical assembly, electrical connection and precision positioning. Made with advanced technology and high-quality materials, they comply with international standards and support customization to serve diverse industries.
Shaft: A key mechanical component for torque transmission, part support and positioning, with high precision, strong load-bearing capacity and wear resistance, widely used in auto parts, machinery and renewable energy equipment.
Cotter Pin: A safety locking fastener with simple structure and easy installation, preventing vibration-induced loosening, applied in mechanical connections, auto parts and electrical equipment.
Contact Pin: A precision conductive component for electrical connection and signal/power transmission, with excellent conductivity and corrosion resistance, widely used in electronics, electric meters and communication devices.
| System of Measurement | Inch, Metric |
| Material | Stainless Steel, Carbon Steel, Steel, Brass, Iron, Aluminum |
| Thread Size | Metric: M1-M16; or customized |
| Head Type | Pan Head, Hex Head, Slotted Head, Torx Head, One-Way Head, Step Head, Flat Head, Large Head |
| Surface Finishing | Zinc Plating, Nickel Plating, Black Oxide, Dacromet |
| Production Process: | Cold Heading, Cold Forging，Cold Forming |
| Standard | ISO, JIS, GB, ANSI, BSW, DIN, Non-standard customized |
| Grade | 4.8, 6.8, 8.8, 12.9, etc |
| Brand | TNHO |
| Application | Electric Meter, Electrical, Electronic, Auto Parts, Renewable Energy Industry, etc. |
1.High Precision & Stability: Advanced cold forming processes ensure precise dimensions, smooth surfaces and consistent performance, meeting high-precision application needs.
2.Durable & High-Quality: Selected premium materials and professional surface treatment enhance corrosion, wear and rust resistance, prolonging service life.
3.Complete Specifications & Customizable: Full-range specifications available, supporting non-standard customization to match diverse industry needs.
4.Easy to Install & Versatile: Reasonable structure for easy installation, widely used in electric meters, electronics, auto parts and renewable energy.
5.Reliable & Safe: Strict full-process quality control ensures products meet international standards and avoid safety hazards.
Rich Experience
Founded in 1987, we have over 30 years of experience in manufacturing high-difficulty and special fasteners, with strong custom R&D capabilities.
Strong Production Capacity
Covering 15+ mu, with 200+ employees and 2000+ production machines, we have complete manufacturing capabilities from precision components to large structural parts.
Strict Quality Control
Complete quality control system with professional testing equipment and team to ensure products meet international standards and customer needs.
Customization Expertise
Specialized in non-standard fastener R&D and production, integrating cold forging and precision machining to meet demanding customer requirements.
One-Stop Service
Comprehensive service from pre-sales consultation to after-sales follow-up, with global sales and continuous international cooperation expansion.
Reliable Strength
Complete industrial chain, standardized management and relevant certifications, enjoying a good market reputation.
