Cam and Groove Coupling Socket Body Material 304 Stainless Steel Type D Coupling Size 4 in Female Connection Type NPT Hose Fitting Size 4 in FNPT Max Working Pressure @ 70 F 100 psi Socket Inside Diameter 4 3/4 in Gasket Material Nitrile Overall Length 92 mm Includes Locking Arm No Thread Size 4 in -8