... ,1/4,5/32 3/16,5/16. material: steel, stainless steel... Fastenerwe use cold forged technique, not only save materials ... of industrial products. types: flat head ,countersunk head, round body, hex body, open end, closed end, body with ribben, body with ... ,1/4,5/32 3/16,5/16. material: steel, stainless steel, brass,aluminium. Surface treat: white zinc (CR+3), yellow ...