NIPPLE; LUBRICATION ACCESSORY (ALEMITE TYPE) BUTTON HEAD. WITH BUILT-IN CHECK VALVE; MATERIAL CADMI-PLATED STEEL; NOMINAL HEAD SIZE 5/8"; FOR PRESSURE GREASE. MALE THREAD 3/8" NPTF, MIN. THREAD LENGTH (MM) 11.1; E/NOMINAL EXAGON FACES 3/4"; TOTAL LENGTH (MM) +/-1 24.2