M3 x 16mm Metric Hex Socket Countersunk Flat Head Screw Bolts Black 50PCS
ion: 10.9 Alloy Steel Material, 0.5mm Thread Pitch, Hex Key Hex Socket Countersunk Flat Head Key Bolts Screws M3 x 16mm. Countersunk bolts is anti-corrosion,rustless,non-pollution and high-hardness. It is widely used in industrial.