High-Strength Automotive Bolts and Wheel Fasteners

The images display various cylindrical metal components featuring hexagonal flange heads and central through-holes, with a high-gloss electroplated finish. These parts serve as critical connection fasteners for automotive chassis, wheels, or engine peripherals. The flange face provides a larger bearing area to effectively distribute clamping force and prevent loosening, meeting anti-vibration requirements during vehicle operation.

The manufacturing process involves cold heading for the head, thread rolling, and subsequent turning or grinding for precision finishing. Strict controls are applied to thread accuracy, shank straightness, and flange flatness. Weide Auto Industry is equipped with multi-station cold heading machines, precision high-speed thread rollers, and CNC lathes to ensure consistent dimensional control of these high-strength fasteners. Heat treatment processes are employed to guarantee core hardness and surface toughness in compliance with IATF 16949 standards.

We provide one-stop services ranging from material selection (such as alloy steel and carbon steel) to surface treatments (including zinc plating and Dacromet). Leveraging testing equipment such as direct-reading spectrometers, Rockwell hardness testers, and friction coefficient testers, we strictly verify the mechanical properties and corrosion resistance of each batch. Buyers can specify tolerance grades and surface treatment specifications based on drawings to obtain quotation solutions tailored to OEM or aftermarket needs.