M6x40mm Expansion anchor bolt with flat washer and hex nut. Applications: be widely used in fence, burglarproof doors and windows, canopy, air conditioning rack fixation, home decoration, engineering, etc. The working principle of expansion screw: Put the expansion screw into the ground or the hole 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. Product Name: Expansion Bolt Material: 304 Stainless Steel Thread Dia: 8mm/ 0.3 inch Main Color: Silver Tone Thread Size: M6x40mm Type: Hex Nut, Sleeve Anchor Total Length: 45mm/ 1.8 inch Sleeve Length: 40mm/ 1.6 inch Sleeve Diameter: 10mm/ 0.4 inch Drill Punch Diameter: 10mm/ 0.4 inch Hex Width: 10mm/ 0.4 inch Weight: 90g Package Content: 5 x Expansion Bolt Note: Light and different displays may cause the color of the item in the picture a little different from the real thing.