... ). Standard: ASTM A193, A320, DIN975, DIN976, SAE J429 •Threaded rods/stud bolts (double end studs or full threaded studs).•Standard: ASTM ... , ANSI B18.3. •Class: 6.8, 8.8, 10.9, 12.9•ANSI surface: plain, black, Z.P, H.D.G ... L/C at sight•Packing: per your demand. Threaded rods/stud bolts