Our serrated hexagonal flange bolts are high-strength structural fasteners integrated with a hexagonal drive head and an enlarged serrated flange surface forged into one single piece. Different from ordinary separate hex bolts plus loose washers, this bolt removes the need for additional flat washers or lock washers during installation, greatly simplifying assembly workflows for automated production lines, automotive assembly, chassis fixing, construction equipment and electrical cabinet installation.
The serrated anti-slip teeth distributed on the bottom face of the flange closely bite the surface of mounted workpieces once tightened, delivering excellent anti-slip and anti-loosening effects under long-term vibration, bumping and alternating load conditions. Manufactured from medium carbon steel with precise heat treatment, the bolts reach Grade 8.8 high tensile strength standard. The surface adopts yellow zinc electroplating plus chromate passivation treatment, forming a dense protective zinc layer that delivers reliable rust and corrosion resistance.
We keep complete metric specifications from M6 to M16 in long-term stock, including full-thread and half-thread types. Customized thread length, shank diameter and special coating solutions are supported for overseas engineering bulk orders, widely exported to Southeast Asia, South Asia, the Middle East, Europe and other global markets.
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