High strength bolts with large hexagon head for steel structures
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National standard:GB/T1228-1231
Materials:Alloy Steel
Finish:Black Dacromet
Grade:10.9s. 10H
Thread:6g. 6h
Japanese standard:JIS B 1186
Finish:Black
Grade:F8T.F10T
Materials:Alloy Steel
German standard:DIN6914-6916
Finish:Black.Dacromet
Grade:10.9HV
Materials:Carbon steel.Alloy Steel
Americon standard:ASME B 18.2.6(ASTM A325 A490)
Finish:Type-1. Type-3. Mechanical Galvanized. HDG. Dacromet
Grade:A325/A325M. A490/A490M
Materials:Carbon steel.Alloy Stee
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