Screw Size: 6.5 mm x 19.5 mm; Hex Width: 4 mm ▶︎ Made of 410 stainless steel, with high hardness, corrosion resistance, and rust resistance, it can be firmly fixed indoors and outdoors and is not easily deformed or discolored. ▶︎ Self-drilling screws can firmly drill holes in wood, sheet metal, and other surfaces. They reduce resistance during screwing and prevent cracking. They can also firmly connect metal hardware to wood because the threaded rod is firmly held in the wood. Connections of color steel plates, wall beams, and other aluminum, plastic, and iron parts are also possible. ▶︎ Widely used in various industries such as manufacturing, construction, engineering, office equipment, the machinery industry, and furniture assembly. ⭐ Immediate purchase OK! Free shipping ⭐ Please check the actual photos for the product condition ♪ #Nao's product list is here ✨☜ 36-380002 uxcell Hex Socket Self-Tapping Screw 410 Stainless Steel Sheet Metal Flat Head Drill Screw 6.5 mm x 19.5 mm 50 pieces Silver