Cam and Groove Coupling Socket Body Material 316 Stainless Steel Type D Coupling Size 2 1/2 in Female Connection Type NPT Hose Fitting Size 2 1/2 in FNPT Max Working Pressure @ 70 F 150 psi Socket Inside Diameter 3 1/64 in Gasket Material Nitrile Overall Length 3 9/32 in Includes Locking Arm Yes Thread Size 2 1/2 In.-8