400 Pressure Washer 3/8″ Male NPT to Quick Connect Plug Zinc Couplers by | Jul 22, 2026400 pack of 3/8-inch male NPT to male Quick Connect zinc-plated couplers for pressure washer attachments. Coupler will handle 4,000 PSI, 10.5 GPM, and temperatures up to 212° F. .
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