Shop for the Karcher M22 Female Coupler With 1/4" NPT Female Adapter at Pressure Washers Direct. Research Karcher 886622014881 pressure washer accessories online. Find Karcher KAR 86410380 pressure washer accessories & .25 metric swivel 8.641-038.0 features and specifications. Get the best deal; compare Karcher 8.641-038.0 prices now. Buy the KAR 86410380 direct and save.