ASME ANSI hex bolt covers the dimensional requirments of inch series hex bolt.The common standard of  ASME ANSI hex bolt is ASME B18.2.1. It includes hex head bolt and heavy hex head bolt. There are full thread and half thread bolt. The size from 1/4"-4" diameter. ASME hex bolt is widely used,Website:http://www.chinajinrui.net, mainly in the field of machinery and equipment, construction, automobile, railway and other industries. The mechanical property has grade 2, grade 5, grade 8.  StandardGradeFinishASME B18.2.12PlainZinc plated5Yellow zinc platedPTFE8BlackDacrometOtherHDGOther