GB/T1228~1231 High strength bolts with large hexagon head, large hexagon nuts and plain washers for steel structures GB/T3632~3633 Sets of torshear type high strength bolt hexagon nut and plain washer for steel structures GB/T16939 High strength bolts for joint of space grid structures GB/T10433 Cheese head studs for stud welding MIL.P-23469 Sets of high strength round head huck rivet GB/T5780~5786 Hexagon head bolts GB/T6170~6173 Hexagon nuts ASTM A325 A490 Heat-treated steel structural bolts ASTM A325M A490M High strength bolts for structural steel joints ASTM F1852 揟wist off?type tension control structural bolt/nut/washer assemblies, steel, heat treated ASTM A193/A193M Alloy steel and stainless steel bolting materials for high-temperature service ATSM A563 A563M Carbon and alloy steel nuts ASTM A194/A194M Carbon and alloy steel nuts for bolts for high-pressure and high-temperature service ASTM A307 Carbon steel bolts and studs DIN6914~6919 High strength bolts with large hexagon head, large hexagon nuts and plain washers for steel structures DIN931: 933 Hexagon head bolts ISO7412; 4775; 7416 High strength bolts with large hexagon head, large hexagon nuts and plain washers for steel structures ISO4014; 4017 Hexagon head bolts JIS B 1186 High strength hexagon bolts JSS II 09 High strength T.C. bolts BS4395 High strength friction grip bolts and nuts, washers AS1252 High strength steel bolts with associated nuts and washers for structural engineering