{"product_id":"parker-391p-4-2-compression-pipe-coupler-1-8-27-nptf-brass","title":"Parker 391P-4-2 Compression Pipe Coupler 1\/8-27 Nptf Brass","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe PARKER 391P-4-2 is a compression tube pipe coupler body designed to connect a plug-in stem fitting to a pipe thread port. Machined from brass, it accepts a 1\/8-27 NPTF thread and is rated for a maximum working pressure of 150 psi and a temperature range of 0 to 150 degrees F. This fitting is used in compressed air, pneumatic control, and fluid handling lines where a secure, leak-resistant compression-to-pipe transition is required. Licensed plumbers, HVAC technicians, and industrial pipe fitters are the typical installers.\u003c\/p\u003e\u003cp\u003eThis coupler body suits light-duty pneumatic and fluid distribution systems in both residential and commercial settings. It is commonly installed at panel connections, instrument ports, or branch line takeoffs where a plug-in compression stem must transition to a threaded pipe port. The compact brass body fits into tight spaces and is well suited for control tubing runs in HVAC equipment, refrigeration panels, and pneumatic instrumentation circuits.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eBrass construction for corrosion resistance in air and fluid service\u003c\/li\u003e\n\u003cli\u003e1\/8-27 NPTF thread provides a dry-seal mechanical connection at the pipe end\u003c\/li\u003e\n\u003cli\u003ePlug-in stem end accepts standard compression tube inserts for quick assembly\u003c\/li\u003e\n\u003cli\u003e150 psi maximum working pressure suitable for light pneumatic and fluid lines\u003c\/li\u003e\n\u003cli\u003eOperating temperature range of 0 to 150 degrees F covers typical HVAC and industrial control applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or direct-use fitting for compression tube systems requiring a plug-in stem to pipe coupler body with a 1\/8-27 NPTF thread connection.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified plumber, pipefitter, or HVAC technician. Depressurize and isolate the line completely before removing or installing any compression fitting. NPTF threads are designed for dry-seal assembly; apply thread sealant only if required by the system specification and local code. Inspect the compression stem seat and tube end for burrs or damage before making up the joint.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Brass\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitting Type\u003c\/strong\u003e: Pipe Coupler Body\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnd Connections\u003c\/strong\u003e: Plug-in Stem to Pipe\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/8-27 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: NPTF\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Working Pressure\u003c\/strong\u003e: 150 psi\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Temperature\u003c\/strong\u003e: 150 degrees F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Temperature\u003c\/strong\u003e: 0 degrees F\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: PARKER\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 391P-4-2\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PARKER","offers":[{"title":"Default Title","offer_id":51542444736818,"sku":"391P-4-2","price":35.87,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/021cae33fe0f505fdcdf111dc3afd8e4.jpg?v=1785900737","url":"https:\/\/voomisupply.com\/products\/parker-391p-4-2-compression-pipe-coupler-1-8-27-nptf-brass","provider":"Voomi Supply","version":"1.0","type":"link"}