1. Standard: DIN, ANSI, BS, ISO,JIS 2. Material: Carbon steel ,Stainless steel 3. Size: M6 to ... )Thread: MM, UNC, UNF and BSW5)Can be made with different tensile strength, such as Class 4.6, 4.8 ... 10.9 and 12.9, inperial grade 2, 5, 8 and 106)Can be supplied with different finish, such as bright, zinc ... plated, hot-dip 7)Can be made with different standards, such as ISO, DIN, AS/NZS, GB, ...