Cam and Groove Coupling Socket Body Material 316 Stainless Steel Type D Coupling Size 3 in Female Connection Type NPT Hose Fitting Size 3 in FNPT Max Working Pressure @ 70 F 125 psi Socket Inside Diameter 3 in Gasket Material Nitrile Overall Length 3 13/16 in Includes Locking Arm Yes Thread Size 3 in -8