1.Reliable Performance – Made from medium-carbon steel that is heat-treated to reach Grade 8.8 strength (≥ 800 MPa tensile, ≥ 640 MPa yield). The integrated serrated flange acts as a built-in lock-washer, biting into the mating surface to stop bolt-head slippage and maintain clamp load under shock or vibration. Optional electro-zinc or Dacromet coatings add basic corrosion protection without altering thread fit.

2.Versatile Application – Widely used in automotive bodywork, small-engine housings, appliance frames, sheet-metal fabrications, and general machinery where a secure, vibration-resistant joint is required but service crews may have only a screwdriver or a socket to hand.

3. Easy to Install – The combo “cross + hex” head design lets operators choose between a Phillips driver for rapid assembly or a spanner/impact socket for high-torque tightening. The flange eliminates separate washers, centers the bolt in oversized holes, and cuts total installation time.

4. Assured Quality – Produced under ISO 9001 quality management and conforming to DIN 6921 flange dimensions and ISO 898-1 mechanical properties. Every lot is hardness-verified, thread-gauge checked, and subjected to salt-spray and vibration-loosening tests; EN 10204 3.1 material certificates and full batch traceability are available on request, ensuring a long, dependable service life.