2pcs M4x20mm 10.9 Grade Hex Socket Reverse Left Hand Thread Screw Bolt Black

Made of 40Cr Steel material,black oxide finish,hex socket 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.

Tags:$0 - $20,Bolts,Dowel Screws & Hanger Bolts,Fasteners,Hardware,Left Hand Bolts,Nails,Screws,Screws & Bolts,Screws & Fasteners,Socket Head Screws

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