China Hex Socket Head Screws factory Product description Compared to grade 12.9 steel, these alloy steel shoulder screws are the strongest screws we offer. They have standard shoulders with small tolerances and are suitable for most machinery and equipment. Also called demold bolts, they are commonly used in punches and die assemblies, and as shafts or pivot points. Product specifications Shoulder FitStandard Thread TypeMetric Thread SpacingCoarse Thread FitClass 6g Thread DirectionRight hand Head typeSocket CoatingBlack Oxide MaterialAlloy steel StandardISO7379 Feature Has good chemical resistance and may be slightly magnetic. Standard shoulders with tighter tolerances allow them to fit most machines and equipment. They are often used to guide or align components, and as shafts or pivot points.China Hex Socket Head Screws factory website:http://www.xgf-hardwares.com/hex-socket-screw/