... •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, 4.8/8.8/10.9•Size: 1/4"-3 ... Hex socket head screws standard: DIN912, ANSI B18.3. •Class: 6.8, 8.8, 10.9, 12.9•ANSI surface: plain, black, Z ... at sight•Packing: per your demand. Threaded rods/stud bolts