1.Standard and nonstandard 2.DIN ISO UNC BSW AS JIS 3.Zinc plated,yellow zinc ... 9/12.9(ANSI A307/2/5/8/A325)Standard: DIN,ANSI,UNI,JIS,ISOincl.DIN912, ISO4762(3) Carriage Bolts ... /12.9(ANSI A307/2/5/8/A325)Standard: DIN,ANSI,UNI,JIS,ISOincl.DIN603, ANSI/ASME 18.5, ... 6/8/10/12(ANSI 2/5/2H)Standard: DIN,ANSI,UNI,JIS,ISOincl.DIN934/439/6923,DIN985/986/982 ... ANSI A307/2/5/8/A325)Standard:GB,ANSI,DIN,UNI,JIS,ISO