... A193, A320, DIN975, DIN976, SAE J429 •Threaded rods/stud bolts (double end studs or full threaded studs).•Standard: ASTM A193, A320, DIN975, DIN976 ... , SAE J429 •Class: B7, B7M, L7, L7M, B16, B8, B8M, 4.8/8.8/10 ... socket head screws standard: DIN912, ANSI B18.3. •Class: 6.8, 8.8, 10.9, 12.9•ANSI surface: plain, black, Z.P ...