GB/T 5782 hexagon head bolt is a partial-thread fastener equivalent to ISO4014 and DIN931. The integrated smooth (unthreaded) shank provides shear resistance and helps maintain positional stability under heavy load and vibration.

Offered in carbon steel grades 4.8–12.9 and stainless steel A2‑70 and A4‑80. Finishes include electro-galvanized, hot-dip galvanized and black oxide. Non-standard lengths from M6 to M64 can be supplied on request. Typical applications include steel construction, engineering machinery, wind towers, heavy flanges and bridge projects. Please confirm grade, finish and length when specifying.