Cam and Groove Adapter Plug Body Material Aluminum Type A Coupling Size 6 in Female Connection Type NPT Hose Fitting Size 4 in FNPT Max Working Pressure @ 70 F 75 psi Plug Outside Dia 6 15/16 in Overall Length 3 31/32 in Includes Locking Arm Yes Thread Size 4 in -8 Plug Length 2 9/32 in