You're on a plumbing repair or irrigation fix and you have two fittings that don't match — either the adapter isn't in your truck or the run to the supply house is 30 minutes. Threaded brass adapters are what bridge the gap when you have mismatched connections. 3/8-inch female NPT on one end, 1/4-inch male NPT on the other — covers the reducing connections that show up most often in water heater installations, irrigation manifolds, and small piping. Brass construction handles the repeated threaded make-and-break of maintenance work better than zinc-plated steel in water applications. Full hex body lets you wrench it without rounding the fitting. Tightening to torque spec on NPT fittings requires thread sealant — not hand-tight only. Standard in the fitting inventory of plumbers and irrigat Stocked at Crofton Lumber and Akron Lumber.