{"product_id":"sandvik-coromant-5781921-threading-insert-20-tpi-un","title":"Sandvik Coromant 5781921 Threading Insert 20 Tpi Un","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SANDVIK COROMANT 5781921 is a solid carbide laydown threading insert designed for external UN thread cutting at 20 threads per inch. Part of the CoroThread 266 series, it features a TiCrAlN\/TiN coating applied via PVD process, providing wear resistance and thermal stability during high-speed threading operations. The insert has a 3\/8 inch (9.53 mm) inscribed circle, a thickness of 5\/32 inch (3.97 mm), and a 60-degree included angle with a single tooth per side. It is installed by machinists and CNC turning specialists on lathes and threading machines configured for right-hand external UN thread profiles.\u003c\/p\u003e\n\u003cp\u003eThis insert is suited for right-hand external threading operations on ferrous and non-ferrous workpieces where UN thread standards are required. It fits CoroThread 266 series toolholders and is appropriate for production turning environments where consistent thread form and tool life are priorities. The chipbreaker designation A and insert size code 16 should be matched to the corresponding toolholder geometry before installation. This insert is sold individually, with a minimum order quantity of 10 units.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSolid carbide substrate for rigidity and wear resistance in threading applications\u003c\/li\u003e\n  \u003cli\u003eTiCrAlN\/TiN PVD coating for extended tool life and thermal protection\u003c\/li\u003e\n  \u003cli\u003e60-degree included angle for standard UN external thread profile\u003c\/li\u003e\n  \u003cli\u003e20 TPI rating for consistent thread pitch accuracy\u003c\/li\u003e\n  \u003cli\u003e3\/8 inch inscribed circle with 0.1732 inch hole diameter for secure toolholder seating\u003c\/li\u003e\n  \u003cli\u003eRight-hand cutting geometry for standard external thread orientation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with CoroThread 266 series toolholders accepting insert size code 16 with right-hand, external UN thread geometry. Verify toolholder seat and clamping compatibility using the insert size code 16 and chipbreaker designation A before installation.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a qualified machinist or CNC tooling technician with the machine fully powered down and in a locked-out state. Use the appropriate torx or insert-clamping key specified for the CoroThread 266 toolholder to secure the insert without overtightening. Confirm correct seating in the pocket before resuming operation. Inspect the insert edge and coating condition at regular intervals and replace at first sign of chipping or thread form degradation.\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 Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Grade\u003c\/strong\u003e: 1135\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UN\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Type\u003c\/strong\u003e: External\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Hand\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThreads Per Inch\u003c\/strong\u003e: 20\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIncluded Angle\u003c\/strong\u003e: 60 degrees\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)\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\u003eCoating\/Finish\u003c\/strong\u003e: TiCrAlN\/TiN\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating Process\u003c\/strong\u003e: PVD\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: CoroThread 266\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Size Code\u003c\/strong\u003e: 16\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.14 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMinimum Order Quantity\u003c\/strong\u003e: 10\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: 5781921\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SANDVIK COROMANT","offers":[{"title":"Default Title","offer_id":51733822112050,"sku":"5781921","price":614.56,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/5929439e42fa52d950984d662a610ba4_4fed1c59-bda4-4216-b46f-e34a64b4dd8d.jpg?v=1788759468","url":"https:\/\/voomisupply.com\/products\/sandvik-coromant-5781921-threading-insert-20-tpi-un","provider":"Voomi Supply","version":"1.0","type":"link"}