Thread Size 3/8" NPT; Double Ball Check; Common use for Ball Valve

Thread Size 3/4"-16 UNF; Double Ball Check; Only use for High Pressure Plug Valve

Thread Size 1/4" NPT; Single Ball Check; Common use for Ball or Gate Valve

Thread Size 3/4" NPT; Single Ball Check; Common use for Ball or Gate Valve

Thread Size 1/2" NPT; Single Ball Check; Common use for Ball or Gate Valve

Thread Size 1/4" NPT; Single Ball Check; Common use for Ball or Gate Valve

Adapter from zerk (automotive) style fittings to giant buttonhead fitting using standard lubrication equipment.