Hexagon Flange Bolts
A hexagon flange bolt is a hex-head fastener with a built-in circular flange under the head, produced in one piece by precision cold-heading and integrated forming. The wide flange acts as a fixed washer: it spreads the clamp load over a larger bearing area, lowering the pressure on the joined surface and preventing pull-through or embedding in soft materials. The same enlarged head also improves wrench engagement and helps the bolt resist rotation under vibration, so the joint stays tight without a separate lock washer.
Made from carbon or alloy steel, the bolt carries high torque and heavy structural loads while simplifying assembly — fewer parts, fewer steps. It is a dependable choice for connections that must remain secure through shock, vibration and long service, combining the strength of a standard hex bolt with the load-spreading benefit of a washer in a single cold-formed component.
Formed in one piece, it gives the strength of a hex bolt and the load-spreading benefit of a washer without a separate component.
Extensively used in automotive engines and chassis, rail transit, heavy construction machinery and large steel structures, hexagon flange bolts suit critical connections that demand strict anti-loosening and the ability to withstand high torque and heavy loads. They meet the industrial need for long-term stability and safety.
From engines and chassis to rail, machines and steel structures, it earns its place wherever joints must stay tight under load and shock.
