1)Standards: GB/T3632-3633-95
2)Class:10.9s
3)Surface: black, zinc, hot dip galvanized
4) Material: 20MnTiB
5)Sets of torshear type high strength bolts used for steel structure are used in industrial buliding, the bridge of highway and railroad, tower mast structure piping bracker lift machine and other steel structure workshop frame.
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