Cam and Groove Coupling Socket Body Material Aluminum Type B Coupling Size 4 in Male Connection Type NPT Hose Fitting Size 4 in MNPT Max Working Pressure @ 70 F 250 psi Plug Outside Dia 6 25/32 in Socket Inside Diameter 4 47/64 in Gasket Material Nitrile Overall Length 4 7/32 in Includes Locking Arm Yes Thread Size 4 in -8