Headless cylindrical fastener with continuous threads running along the entire length. No smooth shank section. It can be cut into arbitrary lengths on site and matched with nuts, flat washers and spring washers freely. Manufactured from high-quality carbon steel, alloy steel and stainless steel. Strength grades include 4.8, 8.8, 10.9, 12.9. Multiple surface treatments available: black oxide, electro galvanizing, hot-dip galvanizing, Dacromet. Metric thread and UNC/UNF imperial thread specifications are complete. Widely used for ceiling suspension, pipeline support, curtain wall engineering, formwork fixing, flange connection and mechanical equipment assembly.