... :mild steel yellow zinc plated size:1/4",1/8",5/16",3/8",7/16",1/2" thread:UNF,NPT,SAE,BSPT ... ,M8x1.25,M10x1.25,M10x1.5 Inch size: 1/4",1/8",1/16",3/8",1/2",5/16",7/16" BSPT,NPT ... machines, vehicles, industry· cardan shafts· drive shafts· linear guides· hydraulic cylinders· drives· chains· axels · pumps grease fitting ...