... ). Standard: ASTM A193, A320, DIN975, DIN976, SAE J429 •Threaded rods/stud bolts (double end studs or full threaded studs).•Standard: ASTM ... .9•Size: 1/4"-3", 1/4"-4", 1/4"-2", M6-M52. •Surface: black, plain, zinc plated, HDG, color zinc ... 304/316, etc.•Hex socket head screws standard: DIN912, ANSI B18.3. •Class: 6.8, 8.8, 10.9, 12.9 ... L/C at sight•Packing: per your demand. Threaded rods/stud bolts