Alemite 1648-B1 Special Thread Fitting, 65 Degrees, 5/16" UNEF-2A (Pack of 5) Angled lubrication hex fitting for use with industrial machines and equipment Male 5/16-32 UNEF-2A threads for attachment to female-threaded receptacles Zinc-plated steel for strength, durability, and resistance to corrosion Check ball for protection from dirt RoHS compliant for hazardous substance regulations