{"product_id":"smc-pneumatics-kcl04-99-push-to-connect-plug-fitting","title":"Smc Pneumatics KCL04-99 Push-to-connect Plug Fitting","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SMC PNEUMATICS KCL04-99 is a push-to-connect tube fitting plug designed to seal off an open port or tube end in pneumatic and fluid-handling systems. Constructed with a brass body and polybutylene components, it handles working pressures up to 145 psi. The plug accepts a 4 mm outside-diameter tube and is installed without tools by pressing the tubing directly into the fitting. Licensed plumbers, pipefitters, and pneumatic system technicians are the primary installers in both industrial and light commercial environments.\u003c\/p\u003e\n\u003cp\u003eThis fitting is suited for use in compressed-air distribution lines, pneumatic control circuits, and low-pressure fluid systems where a tube run needs to be capped or an unused port needs to be blocked. Its push-to-connect design makes it practical for tight-access installations where threaded or barbed alternatives would require additional tooling. The 4 mm tube OD is a standard metric sizing common in instrumentation, OEM equipment, and pneumatic manifold assemblies.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003ePush-to-connect design requires no tools for installation or removal\u003c\/li\u003e\n  \u003cli\u003eRated to 145 psi maximum working pressure\u003c\/li\u003e\n  \u003cli\u003eCompatible with 4 mm outside-diameter tubing\u003c\/li\u003e\n  \u003cli\u003eBrass and polybutylene construction for durability in pneumatic service\u003c\/li\u003e\n  \u003cli\u003eCompact plug configuration seals open ports or tube ends\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or service fitting for pneumatic systems using 4 mm outside-diameter push-to-connect tubing rated for service up to 145 psi.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eDepressurize and isolate the pneumatic or fluid line completely before installing or removing this fitting. Verify that the tubing outside diameter is exactly 4 mm and that the tube end is cut cleanly and squarely to ensure a proper seal. Push-to-connect fittings should be installed in accordance with the equipment manufacturer guidelines and applicable codes such as the Compressed Air and Gas Institute standards for pneumatic systems. Inspect the fitting for leaks after restoring system pressure.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTube Outside Diameter\u003c\/strong\u003e: 4 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStem Outside Diameter\u003c\/strong\u003e: 4 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Working Pressure\u003c\/strong\u003e: 145 psi\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Brass, Polybutylene\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.01 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 27121700\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\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: KCL04-99\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SMC","offers":[{"title":"Default Title","offer_id":52033455096114,"sku":"KCL04-99","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/1eefb21f65588e16aee10231d5d70a5e.jpg?v=1790021574","url":"https:\/\/voomisupply.com\/products\/smc-pneumatics-kcl04-99-push-to-connect-plug-fitting","provider":"Voomi Supply","version":"1.0","type":"link"}