Comparison : Item # 1317-36-116, 1/8"-27 MPT 45 Degree Ball Check Grease Fitting Steel
Item # 1317-36-116SS, 1/8"-27 MPT 45 Degree Ball Check Grease Fitting 303 Stainless Steel
Item # 1317-36-148, 1/4"-28 Tapered Thread Long 45 Degree Ball Check Grease Fitting Steel
Item # 1317-36-146, 1/4"-28 Tapered Thread 45 Degree Ball Check Grease Fitting Steel
Item # 1317-36-146SS, 1/4"-28 Tapered Thread 45 Degree Ball Check Grease Fitting 303 Stainless Steel