{"product_id":"osg-1311200-npt-pipe-tap-1-4-18-4-flute-hss","title":"Osg 1311200 Npt Pipe Tap 1\/4-18 4 Flute Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 1311200 is a standard NPT pipe tap designed to cut 1\/4-18 tapered pipe threads in aluminum and similar non-ferrous materials. Built from high-speed steel (HSS) with a bright, uncoated finish, this 4-flute tap produces clean, accurate threads for pressure-tight pipe connections. It measures 2.437 inches overall length with a 1-1\/16-inch thread length and a 0.5625-inch shank diameter. The high-hook flute geometry promotes efficient chip evacuation in softer materials, reducing the risk of chip packing and tap breakage. Plumbers, pipefitters, HVAC technicians, and machinists use this tap when threading new fittings, manifold blocks, or port connections that require a standard NPT taper profile.\u003c\/p\u003e\u003cp\u003eThis tap is suited for threading aluminum workpieces in residential, commercial, and light industrial applications. Common install scenarios include tapping ports in aluminum manifolds, valve bodies, pump housings, and pipe fittings that will accept 1\/4-18 NPT threaded connections. The NPT taper profile produces the slight interference fit necessary for leak-free joints when used with appropriate thread sealant or PTFE tape. The Series 108AL designation indicates formulation and geometry optimized for aluminum cutting.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e1\/4-18 NPT taper thread profile for standard pipe connections\u003c\/li\u003e\n\u003cli\u003eHigh-speed steel construction provides toughness and wear resistance\u003c\/li\u003e\n\u003cli\u003e4-flute, high-hook geometry promotes chip evacuation in aluminum\u003c\/li\u003e\n\u003cli\u003eBright, uncoated finish — no coating buildup to affect thread tolerance\u003c\/li\u003e\n\u003cli\u003e0.5625-inch shank diameter fits standard tap wrench or machine collet\u003c\/li\u003e\n\u003cli\u003eSeries 108AL — geometry optimized for aluminum material applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for cutting 1\/4-18 NPT tapered pipe threads in aluminum workpieces. Series 108AL geometry is specified for aluminum material applications.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis tap is installed by a machinist, pipefitter, or plumber using a tap wrench or tapping head sized for the 0.5625-inch shank. Always drill the correct NPT tap drill size before tapping and ensure the workpiece is securely fixtured. Apply a suitable cutting fluid formulated for aluminum to extend tap life and improve thread finish. Inspect threads with an NPT ring gauge after tapping to verify proper fit before assembling pipe connections.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/4-18 NPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: NPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThreads per Inch\u003c\/strong\u003e: 18\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTap Type\u003c\/strong\u003e: Standard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Profile\u003c\/strong\u003e: Standard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHook\u003c\/strong\u003e: High\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: High-Speed Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Bright\/Uncoated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Application\u003c\/strong\u003e: Aluminum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.437 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 1-1\/16 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.5625 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquare Size\u003c\/strong\u003e: 0.4210 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProjection\u003c\/strong\u003e: 0.4590 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.125 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 108AL\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: OSG\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 1311200\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51730631852338,"sku":"1311200","price":68.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/3d1b83e06d33df562ccb1be80ab6475f.jpg?v=1788720559","url":"https:\/\/voomisupply.com\/products\/osg-1311200-npt-pipe-tap-1-4-18-4-flute-hss","provider":"Voomi Supply","version":"1.0","type":"link"}