Standard:DIN985, ANSI/ASME B18.2.2 Material:Carbon Steel, SS A2 (304), SS A4 (316) Finished:PLAIN, ZP, ZYP, BLACK, HDG Class / Grade: Class 5, 6, 8, 10, A2-50, A2-70, A4-50, A4-80/ GRADE 2, 5, 8, 304, 316 Diameter:M6 - M48 & 1/4" - 1.1/2"