GRAINGER APPROVED 1MDG8 Quick Connect Plug,1/4 (M)NPT PK 10 by | Jul 21, 2026Quick-Connect Plug, Inlet 1/4 in (M)NPT, Outlet 1/4 in (M) Quick Connect, Material Galvanized Steel, Max. Pressure 4,000 psi, Max. Fluid Temp. 300 Degrees F Package of 10.