... :M3-M52 2.Length:30-6000mm 3.Standard:ASTM A193, A320, DIN975, DIN976 4.Grade:4.6/4.8/6.8 ... , stainless steel, and so onStandardASTM A193, A320, DIN975, DIN976, SAE J429SizeM3-M52Length30mm to 6000mmClassB7, B7M, L7, L7M, B16, B8, B8MGrade4.6, 4.8 ...