Socket Head Cap Screws Bolts 12.9 Grade Alloy Steel Metric Machine Hex Socket Screw

Socket Head Screws by SUNXULIMI. Details:The material is made of high quality 12.9 grade alloy steel. Their surfaces are treated with black oxide, which has excellent corrosion resistance, firmness, wear resistance and low temperature resistance. Widely used in various precision machinery industries, classified instruments, meters, electronic products, household appliances, communication products, automobiles, locks, lamps, toys and so on. Specification: Thread Diameter 3 mm Head Diameter 5.5 mm Head Height 3 mm Screw Length 10 mm Allen Hex Drive 2.5 mm High Quality Material 12.