ASME B18.3, BS 2470, 4168, DIN 912, 913, 916, 6912, ISO 4762, GOST 7805-70
ASTM A193/A320 - B6, B7, B7M, L7, L7M, B16, L43, B8, B8M, B8T, B8C, B8R, B8S; ASTM A453, A286 - 660A, 660B, 660C, 660D; ASTM A182, A276, A479 - 31803, 32760
Is a fixing product for connecting or fixing parts. Currently, there is a large variety of screws, each of which has its own purpose and design differences.