Which standard defines high-strength bolts?

2017-07-19View Original

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Dear experts: I’ve seen on the internet that high-strength bolts are referred to as such; bolts with a grade of 8.8 or higher are considered high-strength bolts； Is there any documentation to support this? In which document is it specified that bolts with a grade of 8.8 or higher are considered high-strength bolts? I know, please tell me, thanks.

Reply #22017-07-19

HG/T 20634-2009 Table 4.0.1

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Which standard defines high-strength bolts?

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