Cam and Groove Coupling Socket Body Material 316 Stainless Steel Type B Coupling Size 3 in Male Connection Type NPT Hose Fitting Size 3 in MNPT Max Working Pressure @ 70 F 125 psi Socket Inside Diameter 3 5/8 in Gasket Material Nitrile Overall Length 3 13/32 in Includes Locking Arm Yes Thread Size 3 in -8