Features and Benefits:�Grease fitting for the lubrication of mechanical systems�Trivalent zinc plating for resistance to corrosion�5/16"-24 UNF-2A connection�Ball check valve for excluding contaminants"CHAPS" HYDRAULIC FITTING All have high pressure ball check unless otherwise specified Body Material Metal Connection Type Male/Male Length 21/32 in [Max] Male Thread 5/16 in (UNF) Shape Straight Type Thread Forming Fitting Wrench Size 3/8 in