Flange bolts feature an integrated circular flange (serrated or flat) under the head, which increases the bearing surface and contact area. The flange replaces a separate flat washer, providing anti‑loosening, anti‑slip, and reduced surface indentation. Serrated flange faces bite into the workpiece surface when tightened, further enhancing vibration resistance and lock performance. This design simplifies assembly and improves production efficiency.
Customizable options:

Materials: Carbon steel (e.g., C1008/C1045), alloy steel (e.g., SCM435/10B21/40Cr), stainless steel (SS304/SS316/SS410), brass, titanium alloy, etc.

Surface finishes: Electroplated zinc (blue/white, yellow, black), hot‑dip galvanizing, Dacromet, nickel plating, chrome plating, black oxide, phosphating, eco‑friendly zinc‑aluminum coating (Geomet/Zagote), etc.

Other variables: Nominal diameter (M4–M12), length (10mm–100mm), flange diameter & thickness, serrated or flat face, thread class can be manufactured to customer drawings.
Widely used in automotive engines, chassis suspension, household appliances, construction machinery, and any connection requiring vibration resistance.