1. 超能性能 -- -- 从中碳合金钢和热处理到ISO10.9等分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高分高 黑磷酸/黑-津涂层会降低表面摩擦,助推力精度并提供中度腐蚀防护.

For the coating, the surface treatment exceeds 96-hour salt spray resistance (vs. standard black oxide), preventing rust in marine, outdoor, or high-humidity environments. On operational performance: precision-engineered flange head (DIN6921 compliant) distributes pressure evenly, reduces vibration loosening, and protects soft surfaces like aluminum or plastics.

2.Broad Application Range – Commonly specified for automotive engines, transmissions, suspension and frame joints, heavy-duty equipment, steel fabrications, gearboxes and any high-vibration assembly where a built-in washer saves space and assembly time. Suitable for indoor or sheltered outdoor service temperatures from -50 °C to +300 °C including crush-proof storage case for easy organization.

3.Easy to Install – The one-piece serrated (or smooth) flange eliminates separate washers and centers the bolt in oversized holes. ISO coarse-pitch threads roll on smoothly, and the 6-point head accepts all standard sockets or impact drivers, enabling fast, high-torque tightening with consistent preload. Backed by lifetime warranty and 24/7 support for risk-free purchasing。

4.Proven Quality – Produced under ISO 9001 / IATF 16949 systems and fully compliant with ISO 4162 / DIN 6921 dimensions and ISO 898-1 mechanical requirements. Each lot is 100 % thread-gauge checked, hardness verified, crack-inspected, and salt-spray tested; EN 10204 3.1 material certificates and complete traceability provided on request, ensuring reliable, long-service performance.