... Standard: ASTM A193, A320, DIN975, DIN976, SAE J429 •Threaded rods/stud bolts (double end studs or full threaded studs).•Standard: ASTM A193 ... 3", 1/4"-4", 1/4"-2", M6-M52. •Surface: black, plain, zinc plated, HDG, color zinc plated, etc•Materials: ... , 8.8, 10.9, 12.9•ANSI surface: plain, black, Z.P, H.D.G, etc•Diameter: M3-M20•Materials ... /C at sight•Packing: per your demand. Threaded rods/stud bolts