Dixon® diagnostic Male Plug, Series: PD Series, 9/16-18 Nominal, Male O-Ring Boss™, 17 mm Hex, 1.48 in Length, 6000 psi, 70°F, Steel, Polished Chrome, 0.76 in OD Dixon® PD1OM3 PD Series diagnostic Male Plug, 9/16-18 Nominal, Male O-Ring Boss™, Steel