Uxcell M4 X 6Mm Hex Socket Machine Screw Countersunk Round Head Bolts 50PCS
304 Stainless Steel Material, 0.7mm Pitch, Hex Key Hex Socket, Countersunk round Head Bolts Screws, M4 x 6mm Thread.Countersunk bolts is anti-corrosion,rustless,non-pollution and high-hardness.It is widely used in industrial.