Unique Bargains M4 Thread Expansion Bolt Sleeve Anchor 15pcs for 3mm-12mm Hollow Wall

Unique Bargains M4 Thread Expansion Bolt Sleeve Anchor 15pcs for 3mm-12mm Hollow Wall
Unique Bargains
sku: 600953181
$8.82
Shipping from: United States
   Description
Expansion anchor bolt. Features a round slotted/ head. The working principle of expansion screw: Put the expansion screw into hollow wall and then tighten the nuts of the expansion bolt with wrench. The bolt goes outside while the metal sheath does not move. Thus the bigger head of the bolt will expand the metal sheath making it fill the whole hole. Now the expansion screw can not be pulled out. Can installed on the plasterboard cavity wall to hold shelf curtain rod hallstand lamps.
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