... /ANSI931,DIN/ANSI933 (2).Size:M5-M20;1/4"-5/8" (3).Material:carbon steel (4).Length:6-300mm,3/4 ... steel(5).Length:6-300mm,3/4"-5"(6).Grade:4.8 6.8 8.8 (7).Finish:Plain,zinc,black,nickel,H.D.G ... ,brass plating,silver plating(8).Certifications:ISO9000/9001/9004/19011:2000 (9).Minimum order:30 ...