ASTM A194 2H Heavy Hex nut Dia: 1/4" - 2 1/2" Standard: ASTM A194, ... Finish: Plain, ZP, Black, HDG OEM/ODM ASTM A194 2H hex nut1. Type:M6-M1002. Class:Gr. 2H, 2HM, , GR. 4 ... , H. D. G Our factory specialize in producing standard hex Nuts, slotted hex Nuts, square Nuts, special Nuts and kinds of Bolts ... as ASTM A194-2H, 2HM, ASTM A193-B7, B7M, ASTM A325, ASTM A449, A490, GRADE-5, GRADE-8, ASTM A563, and ...