{"product_id":"osg-1736200-pipe-tap-3-8-18-npt-4-flute-cobalt","title":"Osg 1736200 Pipe Tap 3\/8-18 Npt 4 Flute Cobalt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 1736200 is a standard NPT pipe tap designed for cutting 3\/8-18 tapered pipe threads in a wide range of ferrous materials. Built from cobalt high-speed steel, it delivers improved heat and wear resistance compared to standard M2 HSS taps, making it a reliable choice for production and maintenance threading operations. The bright uncoated finish suits general-purpose applications where coating is not required. With 4 flutes and a regular hook geometry, this tap handles carbon steel, alloy steel, die steel, stainless steel, and hardened steel. Licensed plumbers, pipefitters, and machinists will find it at home on the bench or at the job site.\u003c\/p\u003e\u003cp\u003eThis tap is suited for threading pipe fittings, couplings, and manifold ports that require NPT tapered thread form. The 3\/8-18 NPT designation means 3\/8-inch nominal pipe size at 18 threads per inch. At 1-1\/16 inches of thread length and an overall length of approximately 2.56 inches, it fits standard tap wrenches and machine holders for both hand tapping and low-speed machine tapping. Typical applications include HVAC refrigerant line connections, plumbing system fittings, hydraulic manifolds, and instrumentation ports.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCobalt HSS construction for elevated heat resistance in difficult-to-machine materials\u003c\/li\u003e\n\u003cli\u003e3\/8-18 NPT thread form for standard tapered pipe thread connections\u003c\/li\u003e\n\u003cli\u003e4-flute regular hook geometry for controlled chip formation in through and blind applications\u003c\/li\u003e\n\u003cli\u003e1-1\/16 inch thread length provides full engagement for NPT taper\u003c\/li\u003e\n\u003cli\u003eBright uncoated finish compatible with most cutting fluids and tapping compounds\u003c\/li\u003e\n\u003cli\u003eSeries 328 OSG standard pipe tap designation for direct reorder and replacement\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for threading carbon steel, alloy steel, die steel, stainless steel, and hardened steel workpieces requiring 3\/8-18 NPT tapered pipe threads. Fits standard tap wrench drives with a 0.531-inch square drive size and a 0.700-inch shank diameter.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003ePipe taps should be installed by qualified machinists, pipefitters, or plumbers using a properly sized tap wrench or low-speed machine spindle. Always apply an appropriate cutting fluid or tapping compound for the material being threaded, and back the tap off periodically to break and clear chips. Secure the workpiece firmly before tapping to prevent movement and thread misalignment. Follow applicable codes such as ASME B1.20.1 for NPT thread dimensions and tolerances when thread quality is critical to system integrity.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 3\/8-18 NPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThreads per Inch\u003c\/strong\u003e: 18\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: NPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Profile\u003c\/strong\u003e: Standard\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\u003eOverall Length\u003c\/strong\u003e: 2.56 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHook\u003c\/strong\u003e: Regular\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTap Type\u003c\/strong\u003e: Standard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Cobalt 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\u003eShank Diameter\u003c\/strong\u003e: 0.700 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquare Drive Size\u003c\/strong\u003e: 0.531 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Application\u003c\/strong\u003e: Carbon Steel, Alloy Steel, Die Steel, Stainless Steel, Hardened Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 328\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.215 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: OSG\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 1736200\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51730613698866,"sku":"1736200","price":122.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/a87d47f0f8c5fb5fa437d65008d2ae46.jpg?v=1788720298","url":"https:\/\/voomisupply.com\/products\/osg-1736200-pipe-tap-3-8-18-npt-4-flute-cobalt","provider":"Voomi Supply","version":"1.0","type":"link"}