Features and Benefits:�Large grease fitting for high volume flow of lubricant�Trivalent zinc plating for resistance to corrosion�1/4" male NPTF connection�Plunger check valve for excluding contaminants�Maximum operating pressure of 15,000 psi1823-1 Features: -Features dirt excluding plunger check valve. -For rugged applications such as heavy machinery or contractor's equipment. Features dirt excluding plunger check valve. -Body Material: Metal. -Shape: Straight. Generic Dimensions: -Similar to standard button head fittings except larger (0.875'' diameter) to withstand the roughest usage. -Depth: 41.83'' - 77.51'', 0.11 lb. Dimensions: Overall Product Weight: -0.11 Pounds.