uxcell Hex Socket Self-Tapping Screws Carbon Steel Wood Screws Hex Bolt Machine Fittings M3 x 8 mm 400 Pcs Screw Size: M3 x 8 mm; Hex Width: 2 mm Made of carbon steel, which has high hardness, corrosion resistance, and rust resistance. Self-drilling screws can drill holes well in wood, sheet metal, and other surfaces. The screw thread reduces resistance during screwing and prevents cracking. They can also connect metal hardware to wood well because the threaded rod increases the holding power of the wood. Widely used in various industries such as manufacturing, construction, engineering, and assembly. 14-35