Stainless steel external hex bolts are hex head fasteners made from materials such as stainless steel 201, 304, and 316, complying with standards including DIN933, DIN931, GB/T5783, GB/T5782, ISO4017, ISO4014, and JISB1180. The products are categorized into fully threaded and partially threaded types, with the fully threaded variant being the mainstream in the market. The partially threaded type is further divided into heavy hex partially threaded and finished hex partially threaded.