{"product_id":"sandvik-coromant-5781887-threading-insert-8-tpi-npt","title":"Sandvik Coromant 5781887 Threading Insert 8 Tpi Npt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SANDVIK COROMANT 5781887 is a laydown threading insert engineered for external NPT thread cutting at 8 threads per inch. Part of the CoroThread 266 series, this insert is manufactured from solid carbide and coated with a TiCrAlN\/TiAlN PVD finish for extended cutting life and heat resistance at the edge. The insert features a 60-degree included angle appropriate for standard NPT thread form, a right-hand cutting direction, and a single tooth per side geometry. With a 3\/8-inch inscribed circle and 5\/32-inch thickness, it seats into compatible 266-series toolholders used in turning and threading operations on CNC lathes and manual turning centers.\u003c\/p\u003e\u003cp\u003eThis insert is suited for threading operations producing NPT external pipe threads on turned components across manufacturing, maintenance, and industrial production environments. The 1125 grade with PVD coating is well-matched for threading steel, alloy steel, and similar materials where edge toughness and wear resistance are priorities. It is typically installed by machinists and tool-and-die professionals performing single-point threading passes on pipe fittings, couplings, and threaded connectors.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSolid carbide substrate with dual-layer TiCrAlN\/TiAlN PVD coating for wear resistance and thermal stability\u003c\/li\u003e\n\u003cli\u003eRight-hand external NPT thread form at 8 TPI with 60-degree included angle\u003c\/li\u003e\n\u003cli\u003eCoroThread 266 series insert style for use with compatible indexable threading toolholders\u003c\/li\u003e\n\u003cli\u003e3\/8-inch (9.53 mm) inscribed circle and 5\/32-inch (3.97 mm) thickness for precise, repeatable seating\u003c\/li\u003e\n\u003cli\u003eChipbreaker style A for controlled chip formation during threading passes\u003c\/li\u003e\n\u003cli\u003ePVD coating process preserves sharp cutting edge geometry longer than CVD alternatives on fine thread profiles\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use with Sandvik Coromant CoroThread 266 series indexable threading toolholders that accept the 266RG-16 insert style. Confirm toolholder pocket specification before installation.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis insert is installed by qualified machinists following standard indexable insert replacement procedures. Power down and lock out the machine before changing inserts. Use the appropriate torx or hex key torque tool as specified by the toolholder manufacturer — do not exceed the recommended clamping torque. Inspect the toolholder pocket and clamping components for wear or debris before seating the new insert.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Style\u003c\/strong\u003e: 266\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Size Code\u003c\/strong\u003e: 16\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: CoroThread 266\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Grade\u003c\/strong\u003e: 1125\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: TiCrAlN \/ TiAlN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating Process\u003c\/strong\u003e: PVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: NPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Type\u003c\/strong\u003e: External\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThreads Per Inch\u003c\/strong\u003e: 8\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Angle\u003c\/strong\u003e: 60 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Hand\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed Circle\u003c\/strong\u003e: 3\/8 inch (9.53 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e: 5\/32 inch (3.97 mm \/ 0.1563 inch decimal)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHole Diameter\u003c\/strong\u003e: 0.1732 inch (4.40 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Teeth Per Side\u003c\/strong\u003e: 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChipbreaker\u003c\/strong\u003e: A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturers Catalog Number\u003c\/strong\u003e: 266RG-16NT01A080M 1125\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.12 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 23291804\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: SANDVIK COROMANT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 5781887\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SANDVIK COROMANT","offers":[{"title":"Default Title","offer_id":51735222124850,"sku":"5781887","price":567.43,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/cd94e254890a5252541427527eff509e_ce6a08e9-1f01-47de-82a5-3a327777f168.jpg?v=1788770520","url":"https:\/\/voomisupply.com\/products\/sandvik-coromant-5781887-threading-insert-8-tpi-npt","provider":"Voomi Supply","version":"1.0","type":"link"}