SurfaceMaxx M22 Threaded x 1/4-in Quick Connect Set in the Pressure Washer Parts department at Lowes.com
The Beginner's Guide To Pressure Washer Hose Fittings, Couplers and Adapters - PRESSURE WASHR
Sun Joe 14 mm M22 Male - 15mm M22 Female High Pressure Hose Adapter, Fits SPX Series Pressure Washers for Other Accessory Brands SPX-M22M2F - The Home Depot
High Pressure Washer Hose Adapter 1/4 Pressure for Lavor - Walmart.com