Lumax LX-3013-10 Gold/Silver 1/4"-28 Taper Thread (SAE-LT) 45 Degree 0.81" Long Grease Fitting, (Pack of 10) Used on most auto vehicles and industrial equipment Passivated finish for maximum protection from corrosion Heavier wall thickness for extra strength Stress relieved and tempered carbon steel spring Ball check in head prevents dirt from getting in