we have difference nuts which according ANSI/ASME, DIN, BS, AS, GB, JIS and ISO standards. specifacation: A194-2H 2HM(Gr.7, 7M, 4) we have difference nuts which according ANSI/ASME, DIN, BS, AS, GB, JIS and ISO standards. specifacation: A194-2H 2HM(Gr.7, 7M, 4) Structure nuts:A563(Gr.A, B, C, DH) Light nuts:ANSI Gr.2, 5, 8 DIN6915 DIN934(Gr.4, 6, 8, 10, 12)   Structure nuts:A563(Gr.A, B, C, DH) Light nuts:ANSI Gr.2, 5, 8 DIN6915 DIN934(Gr.4, 6, 8, 10, 12)