Check the listing for details. Karcher Pressure Washer 1/4 NPT Quick Coupler Disconnect Socket Set. Condition: New. Listed at 6.59 USD. 1 Pc. Coupler- 1/4 Female NPT Pipe Thread 1 Pc. Plug 1/4 Female NPT Pipe Thread Legacy quick connect couplings are machined from top grade materials to the same exacting specifications as the high cost performance leaders. We have gone a step further to ensure that Legacy Quick Couplers can withstand high temperature, high pressure and aggressive chemicals by including Vinton O-Rings as standard.Female NPT Quick-Connect Socket•Primarily used to snap connect high pressure washer accessories•One end screws onto 1/4" threaded Accessory•One end snaps onto 1/4" quick-connect plugHigh Pressure Brass And Stainless Construction•Corrosion resistant material designed to lastHot or Cold Water•Max Temperature 300 degrees Fahrenheit•Max 4,000 PSICompare the performance - Compare the Price! See photos with ruler, 1/4 NPT pipe thread measures larger than 1/4"