M8x60mm Wall Concrete Brick Expansion Screws Closed Hook Anchor Bolts

M6 male thread Expansion screw hook anchor bolt with flat washer and hex nut.Closed hook bolts suitable for secure and reliable fixing of items and fixtures to concrete, brick, walls and any solid surface.Installation methods: Select a chopping bit with the same diameter as expansion screw casing, and install it on the electric drill for punching.The depth of the hole should be equal to the length of the bolt.Then insert the expansion bolt set into the hole.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 aiming at bolt.The gasket or spring washer outside is used to screw the nut tightly.Product Name: Expansion Hook BoltMain Color: Silver ToneExpansion screw total length: 60mmExpansion tube length: 40mmRing nut length: 34mmOutside diameter: 34mmMaterial: 304 Stainless SteelWeight: 136g/pcsPackage Content:4 x Expansion Hook BoltOnly the above package content, other products are not included.Note: Light shooting 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.