grease fitting: material:mild steel yellow zinc plated size:1/4",1 ... ",3/8",7/16",1/2" thread:UNF,NPT,SAE,BSPT,PTF Grease Fitting/Grease Nipple Material: mild steel, stainless steel, brass ... /16",3/8",1/2",5/16",7/16" BSPT,NPT,UNF,UNC,SAE thread standard · individual, custom-designed solutions· ... shafts· linear guides· hydraulic cylinders· drives· chains· axels · pumps grease fitting 1/4"-28UNF 45degree