Cam and Groove Adapter, Plug, Body Material Aluminum, Type A, Coupling Size 6 in, Female, Connection Type NPT, Hose Fitting Size 4 in, FNPT, Max. Working Pressure @ 70 F 75 psi, Plug Outside Dia. 6 15/16 in, Overall Length 3 31/32 in, Includes Locking Arm Yes, Thread Size 4 in -8, Plug Length 2 9/32 in