High Strength Bolt Manufacturer
Looking for a reliable High Strength Bolt Manufacturer? We are a direct factory in Yongnian, China, producing Grade 8.8, 10.9, and 12.9 bolts with full traceability and MTC EN 10204 3.1.
Why Choose Our High Strength Bolts?
As an experienced High Strength Bolt Manufacturer, we own and operate our manufacturing facility equipped for cold heading, thread rolling, heat treatment, and full mechanical testing.
- 50+ cold heading & thread rolling lines — dedicated to manufacturing M8–M36 high strength bolts.
- 2,000 tons monthly output — stable lead times for bulk manufacturing orders.
- 100% impact testing per batch — Charpy V-notch at low temperature to prevent brittle fracture.
- Standard export packaging — ISPM 15 compliant wooden crates with VCI film.
Mill test certificates (EN 10204 3.1) included with all manufacturing orders.
Manufacturer Quality Control
As a professional High Strength Bolt Manufacturer, each production batch is checked before packing. Test reports are issued with the shipment.
نظام ISO 9001
Our manufacturing process covers incoming wire rod, heading, heat treatment, surface finishing and final inspection.
Mechanical Test Reports
Issued per manufacturing batch for the properties that matter to the ordered grade:
- Tensile strength and proof load
- Hardness (core and surface)
- Charpy impact
- Salt spray hours
Batch Traceability
Heat number recorded from wire rod to finished bolt. Production records and test reports matched by heat number.
Contact Our High Strength Bolt Factory
Send us your specifications. Our engineering team will review and quote directly from the manufacturer.
Prefer to chat? Send your drawing directly to our factory sales team.