4X M8X60mm Wall Concrete Brick Expansion Screws Closed Hook Anchor Bolts

Remember: Do not screw off the nut and prevent the bolt from falling into the hole when the drill is too deep. Tighten the nut for 2 to 3 buckles and unscrew the nut when expansion bolt si very tight without any looseness. Then the fixed items are mounted with perforated fixed part and installed at bolt. The gasket or spring washer outside is used to screw the nut tightly. Product Name: Expansion Hook Bolt Main Color: Silver Tone Expansion screw total length: 60mm Expansion tube length: 40mm Ring nut length: 34mm Outside diameter: 34mm Material: 304 Stainless Steel Weight: 136g / set Package Contents: 8 x Expansion Hook Bolt Only the above package content other are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.