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5pcs M8x30mm Thread 12.9 Grade External Hex Head Left Hand Screw Bolt Black
Description:
- Made of carbon steel material,black oxide finish,external hex head,left hand reverse thread design.
- Fixing component, industrial and construction fasteners.
- To tighten a reverse threaded screw, you turn it counter clockwise.To loosen a reverse threaded screw, you turn it clockwise.
- Used widely in home, office and factory appliance, communication equipments, ship assembly and other machinery industry.
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