DIN931 is the standard German half-thread hex bolt, compliant with ISO4014 and GB/T5782. It features a solid unthreaded shank with threads only at the end. The integrated shank delivers excellent shear resistance, stable positioning and great anti-vibration performance, ideal for heavy-duty connection of thick steel plates.

Available sizes range from M6 to M64 with custom lengths. We supply carbon steel in grade 4.8 to 12.9, and stainless steel A2-70 / A4-80. Multiple surface finishes including electro-galvanized, hot-dip galvanized and black oxide are offered for different anti-rust demands.

Widely applied in steel construction, engineering machinery, wind power, pipeline brackets, bridge and container projects.