Description: Zinc plated prevent rust and durable in use, high wear resistance of product surface. Serration design can extend the surface between the nut and work piece, non-slip and easy to lock. Great to have around for use in wood and wet environments, strong and corrosion resistant Simply tap the nuts into a suitably sized hole and the prongs will hold them in right position. Widely use for Sheet Metal and Wood; Available for Household Supplies, Office Equipment, Toys, Electrical Appliances, Furniture, etc. Specification: Material: Zinc Plated Carbon Steel Color: Silver M3: Opposite Side Size: 12 mm/0.47 inch; Inside Diameter: 3 mm/0.12 inch; Height: 6.1 mm/0.24 inch M4: Opposite Side Size: 14.8 mm/0.58 inch; Inside Diameter: 4 mm/0.16 inch; Height: 6.9 mm/0.27 inch M5: Opposite Side Size: 15.3 mm/0.60 inch; Inside Diameter: 5 mm/0.20 inch; Height: 7.8 mm/0.31 inch M6: Opposite Side Size: 16.2 mm/0.64 inch; Inside Diameter: 6 mm/0.24 inch; Height: 8.0 mm/0.31 inch M8: Opposite Side Size: 18.1 mm/0.71 inch; Inside Diameter: 8 mm/0.31 inch; Height: 8.2 mm/0.32 inch M10: Opposite Side Size: 22.8 mm/0.90 inch; Inside Diameter: 10 mm/0.39 inch; Height: 11 mm/0.43 inch Package Includes:(6 Pack) 50 Pieces T-Nuts