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- Metric Socket Head Cap Screw
- First, the bolt performance grade, that is, the performance grade of bolts for steel structure connection, divided into more than 10 grades of 3.6, 4.6, 4.8, 5.6, 5.8, 6.8, 8.8, 9.8, 10.9, 12.9.
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Xiamen Xinhengjie Hardware Co., Ltd.
[Verified]
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Negotiable
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