... ",5/16",3/8",7/16",1/2" thread:UNF,NPT,SAE,BSPT,PTF Grease Fitting/Grease Nipple Material: mild steel, stainless ... type, double-head type square-type, pin-type, ball-type and other special types Metric Size: M6x1,M8x1,M10x1,M12x1,M13x1 ... ",1/16",3/8",1/2",5/16",7/16" BSPT,NPT,UNF,UNC,SAE thread standard · individual, custom-designed solutions· individual ...