Internal hexagonal screw-Bolt type-老街-腾龙娱乐公司15559858555客服经理电话微信1-老街-腾龙娱乐公司15559858555客服经理电话微信2

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Bolt type

Internal hexagonal screw

The internal hexagonal bolt has a large fastening force. It needs to make through holes in one linked part and threaded holes in another part. It needs special internal hexagonal screwdriver to cooperate with it.

Bolt type

Internal hexagonal screw

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