Interstate Pneumatics PW7223 1/2 Inch NPT Female Stainless Steel Coupler 5200PSI by | Jul 24, 2026Model: PW7223. Crafted from premium stainless steel, this durable coupler resists rust and corrosion for long-lasting use. Design: Quick-Connect Coupler. 1/2″ FNPT Female connection for a secure and leak-free fit.