{"product_id":"sandvik-coromant-5757989-threading-insert-8-tpi-api-round","title":"Sandvik Coromant 5757989 Threading Insert 8 Tpi Api Round","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SANDVIK COROMANT 5757989 is a laydown threading insert from the CoroThread 266 series, designed for external API Round thread cutting applications. It is machined from solid carbide and finished with a dual PVD coating of TiCrAlN and TiAlN for wear resistance at elevated cutting temperatures. The insert produces right-hand external threads at 8 threads per inch, with a 60-degree included angle and a 3\/8 inch inscribed circle (9.53 mm). At 0.1563 inches thick (3.97 mm), it seats into compatible CoroThread 266 toolholders. This insert is installed by machinists and tool-and-die professionals working in oilfield, pipe fitting, and heavy industrial threading operations.\u003c\/p\u003e\n\u003cp\u003eThis insert is used for external API Round threading on pipe, couplings, and related oilfield tubular components. It is suited to CNC turning centers and manual lathes equipped with CoroThread 266 compatible toolholders. The chipbreaker designation A and single-tooth cutting profile make it appropriate for threading passes on round-thread API connections commonly encountered in oil country tubular goods (OCTG) manufacturing and repair. The insert grade 1125 is formulated for threading under stable cutting conditions where PVD-coated carbide provides edge integrity and surface finish control.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSolid carbide substrate with dual PVD coating: TiCrAlN and TiAlN for heat and wear resistance\u003c\/li\u003e\n  \u003cli\u003eAPI Round external thread profile at 8 TPI with 60-degree included angle\u003c\/li\u003e\n  \u003cli\u003eRight-hand cutting orientation for standard external threading operations\u003c\/li\u003e\n  \u003cli\u003e3\/8 inch (9.53 mm) inscribed circle with 0.1732 inch (4.40 mm) mounting hole diameter\u003c\/li\u003e\n  \u003cli\u003eCoroThread 266 series — designed for repeatable indexing and consistent thread form\u003c\/li\u003e\n  \u003cli\u003eManufacturer grade 1125 with PVD coating process for dimensional stability at the cutting edge\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with CoroThread 266 series toolholders that accept insert size code 16. Confirmed manufacturer catalog number is 266RG-16RD01A080E 1125.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis insert is installed by a qualified machinist. Power down and lock out the machine spindle before indexing or replacing any insert. Seat the insert fully in the pocket and verify torque on the clamping screw per the toolholder manufacturer specifications — do not overtighten. Inspect the thread form on a test pass before committing to a full production run, particularly when switching between insert indexes.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\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\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\u003eSeries\u003c\/strong\u003e: CoroThread 266\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Type\u003c\/strong\u003e: External\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: API Round\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 inches (9.53 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e: 0.1563 inches (3.97 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHole Diameter\u003c\/strong\u003e: 0.1732 inches (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\u003eCoating Process\u003c\/strong\u003e: PVD\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating Finish\u003c\/strong\u003e: TiAlN \/ TiCrAlN\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Dimensions\u003c\/strong\u003e: 3.74 inches L x 1.54 inches W x 0.43 inches H\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\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\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: 5757989\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SANDVIK COROMANT","offers":[{"title":"Default Title","offer_id":51734964371762,"sku":"5757989","price":791.35,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/cd94e254890a5252541427527eff509e_d9774876-2c18-4dd4-86e7-a13adc28430f.jpg?v=1788768634","url":"https:\/\/voomisupply.com\/products\/sandvik-coromant-5757989-threading-insert-8-tpi-api-round","provider":"Voomi Supply","version":"1.0","type":"link"}