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 on the 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.Product Name: Expansion BoltMaterial: 304 Stainless SteelThread Dia: 8mm/ 0.3 inchMain Color: Silver ToneThread Size: M6x40mmType: Hex Nut, Sleeve AnchorTotal Length: 45mm/ 1.8 inchSleeve Length: 40mm/ 1.6 inchSleeve Diameter: 10mm/ 0.4 inchDrill Punch Diameter: 10mm/ 0.4 inchHex Width: 10mm/ 0.4 inchWeight: 90gPackage Content: 5 x Expansion BoltNote: Light 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.