{"product_id":"legris-3666-04-08-push-in-reducer-fitting-435-psi","title":"Legris 3666 04 08 Push-in Reducer Fitting 435 Psi","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe LEGRIS 3666 04 08 is a push-to-connect plug-in reducer fitting designed for tube-to-stem connections in pneumatic and fluid handling systems. Constructed from nickel-plated brass, it reduces between a 4 mm and 8 mm outside diameter tube in a single inline connection. The fitting holds a maximum working pressure of 435 psi and operates across a wide temperature range, from -4 degrees F up to 302 degrees F. The FKM o-ring seal provides reliable performance with both liquid and gas media. Installation requires no tools beyond hand pressure to seat the tubing — a standard push-in mechanism locks the line securely. This fitting is used by mechanical contractors, pneumatic system technicians, and industrial maintenance trades.\u003c\/p\u003e\u003cp\u003eThis reducer fitting is suited for inline pneumatic circuits, instrumentation tubing runs, and light fluid distribution systems where a tube outside diameter reduction from 8 mm to 4 mm is needed at a stem connection point. It is compatible with liquid and gas service, making it applicable in compressed air lines, process gas distribution, and low-pressure hydraulic instrumentation circuits. The compact form factor and short overall length of 1.4 inches allow installation in tight panel or manifold spaces where a standard union reducer would not fit.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003ePush-to-connect design — no tools required for tube insertion\u003c\/li\u003e\n\u003cli\u003eReduces 8 mm OD tube to 4 mm OD tube in a single fitting body\u003c\/li\u003e\n\u003cli\u003eNickel-plated brass construction for corrosion resistance in air and gas service\u003c\/li\u003e\n\u003cli\u003eFKM o-ring seal rated for liquid and gas media\u003c\/li\u003e\n\u003cli\u003eWide temperature range: -4 degrees F to 302 degrees F\u003c\/li\u003e\n\u003cli\u003eCompliant with RoHS, REACH, ATEX, PED, ISO 14743, and FDA 21CFR standards\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a push-to-connect reducer for pneumatic and fluid lines using 4 mm and 8 mm outside diameter tubing in tube-to-stem fitting applications.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by pneumatic system technicians or mechanical contractors. Depressurize and isolate the line completely before removing any existing fitting. Cut tubing squarely and deburr the end before insertion to ensure a proper seal. Verify tube outside diameter matches the fitting before seating — do not force mismatched tubing into the collet.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection Type\u003c\/strong\u003e: Tube x Stem\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Nickel-Plated Brass\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTube Outside Diameter\u003c\/strong\u003e: 4 mm x 8 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Working Pressure\u003c\/strong\u003e: 435 psi\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 1.4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Working Temperature\u003c\/strong\u003e: -4 degrees F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Working Temperature\u003c\/strong\u003e: 302 degrees F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eO-Ring Material\u003c\/strong\u003e: FKM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia Compatibility\u003c\/strong\u003e: Liquid and Gas\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: RoHS (2011\/65\/EC), REACH (RG 1907\/2006), ATEX (94\/9\/EC), PED (97\/23\/EC), ISO 14743, UL94 V-0, FDA 21CFR\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.05 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: LEGRIS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 3666 04 08\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"LEGRIS","offers":[{"title":"Default Title","offer_id":51750001541426,"sku":"3666 04 08","price":39.36,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6752075e7586f63e7479bae139225d6a_6a34d7df-7c48-42bb-b571-47fcbc842c40.jpg?v=1788913047","url":"https:\/\/voomisupply.com\/products\/legris-3666-04-08-push-in-reducer-fitting-435-psi","provider":"Voomi Supply","version":"1.0","type":"link"}