{"product_id":"smc-pneumatics-kq2r06-04a-plug-in-reducer-fitting-6mm-x-4mm","title":"Smc Pneumatics KQ2R06-04A Plug-in Reducer Fitting 6mm X 4mm","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SMC PNEUMATICS KQ2R06-04A is a push-to-connect plug-in reducer tube fitting designed for pneumatic plumbing lines where tube outside diameter steps down from 6mm to 4mm. Constructed from brass with polybutylene contact components, this fitting handles a maximum working pressure of 145 psi and operates across a temperature range of 23 degrees F to 140 degrees F. The push-to-connect design allows for fast, tool-free tube insertion and positive retention, making it well suited for production environments, maintenance applications, and instrumentation lines where quick disconnects and reliable seals are required.\u003c\/p\u003e\u003cp\u003eThis fitting is used in compressed air distribution systems, pneumatic control circuits, and light fluid handling lines. Its reducer configuration is common in installations where two different tube sizes must be joined inline without additional adapters. Overall installed length is 33.6mm. The fitting is appropriate for both new plumbing runs and retrofit connections in industrial, commercial, and light manufacturing settings where polybutylene-compatible pneumatic fittings are specified.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003ePush-to-connect design allows tool-free tube insertion and secure retention\u003c\/li\u003e\n\u003cli\u003eReduces from 6mm tube outside diameter to 4mm stem outside diameter inline\u003c\/li\u003e\n\u003cli\u003eBrass body construction for corrosion resistance and durability under pressure\u003c\/li\u003e\n\u003cli\u003eRated to 145 psi maximum working pressure\u003c\/li\u003e\n\u003cli\u003eOperates from 23 degrees F to 140 degrees F\u003c\/li\u003e\n\u003cli\u003eRoHS compliant construction\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style push-to-connect reducer fitting for pneumatic systems using 6mm and 4mm outside diameter polybutylene or compatible tubing.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis fitting is typically installed by pneumatic technicians or pipefitters working on compressed air or instrumentation lines. Before installation or removal, depressurize the line completely and verify the system is at zero pressure. Tube ends should be cut cleanly and squarely to ensure a proper seal at the push-to-connect collet. Confirm tube outside diameter and material compatibility before insertion.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection Type\u003c\/strong\u003e: Push-to-Connect\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Brass, Polybutylene\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTube Outside Diameter\u003c\/strong\u003e: 6mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStem Outside Diameter\u003c\/strong\u003e: 4mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Working Pressure\u003c\/strong\u003e: 145 psi\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 33.6mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Working Temperature\u003c\/strong\u003e: 23 degrees F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Working Temperature\u003c\/strong\u003e: 140 degrees F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.1 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: RoHS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 27121700\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: SMC PNEUMATICS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: KQ2R06-04A\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SMC","offers":[{"title":"Default Title","offer_id":52009893691698,"sku":"KQ2R06-04A","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/30f7bd33d5b722eadc5182cf47b22e81_885fb43d-4365-4a4f-ba38-e397dea79a59.jpg?v=1790003481","url":"https:\/\/voomisupply.com\/products\/smc-pneumatics-kq2r06-04a-plug-in-reducer-fitting-6mm-x-4mm","provider":"Voomi Supply","version":"1.0","type":"link"}