Interstate Pneumatics PW7224 1/2 Inch NPT Male Stainless Steel Coupler 5200 PSI by | Jul 24, 2026Model: PW7224. Crafted from premium stainless steel, this durable coupler resists rust and corrosion for long-lasting use. Design: Quick-Connect Coupler. 1/2″ MNPT Male connection for a secure and leak-free fit.