1. Size: M4-M52, 3/16"-2" 2. Length: 30mm-3000mm 3. Class: 4.8, 6.8, 8.8, B7 1) Standard: B7 B8 B8M DIN 975 ... , DIN 976A, , UNC ROD, BSW ROD2) Size: M3-M56, UNC ... ) Material: stainless steel, low carbon steel, carbon steel, alloy steel...4) Grade: SUS304 SUS316 SUS201 B85) Surface: Plain, Black, Zinc Cr ...