{"product_id":"sandvik-coromant-5857580-threading-insert-20-tpi-un","title":"Sandvik Coromant 5857580 Threading Insert 20 Tpi Un","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SANDVIK COROMANT 5857580 is a laydown threading insert designed for external UN thread cutting on CNC lathes and threading-specific toolholders. Built from solid carbide with a PVD-applied TiCrAlN\/TiN finish, this insert handles right-hand external threading at 20 threads per inch with a 60-degree included angle. It carries a manufacturer grade of 1135 and belongs to the CoroThread 266 series. The 3\/8-inch inscribed circle and 5\/32-inch thickness place it in a mid-range insert size commonly used in precision threading operations on steel and similar workpiece materials. Machinists and CNC operators in production and maintenance shops install this insert as a replaceable cutting edge in compatible CoroThread 266 toolholders.\u003c\/p\u003e\u003cp\u003eThis insert is suited for external UN thread forms on turned components across general manufacturing, job shop, and maintenance environments. The single-tooth-per-side geometry and F chipbreaker designation make it well-matched to controlled-chip threading passes. Its right-hand orientation applies to standard right-hand threaded features cut with the tool traversing toward the chuck. Solid carbide construction with PVD coating supports consistent thread form accuracy across multiple passes and tool changes.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSolid carbide substrate with PVD TiCrAlN\/TiN coating for wear resistance and edge integrity\u003c\/li\u003e\n\u003cli\u003eCoroThread 266 series insert style for use with compatible 266-series toolholders\u003c\/li\u003e\n\u003cli\u003eRight-hand external UN thread form at 20 TPI with 60-degree included angle\u003c\/li\u003e\n\u003cli\u003e3\/8-inch (9.53 mm) inscribed circle and 5\/32-inch (3.97 mm) thickness\u003c\/li\u003e\n\u003cli\u003eSingle tooth per side with F chipbreaker geometry for controlled chip formation\u003c\/li\u003e\n\u003cli\u003eManufacturer grade 1135 selected for threading applications in common workpiece materials\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a replacement insert for CoroThread 266 series toolholders accepting insert size code 16 with a 0.1732-inch (4.40 mm) hole diameter. Confirm toolholder seat geometry and clamping style before installation.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by qualified CNC machinists or toolroom personnel. Power down and lock out the machine before seating or removing inserts. Use the correct torx or clamping key specified for the CoroThread 266 toolholder to avoid over-torquing the insert screw. Inspect the pocket seat for chips or debris before seating the new insert to ensure proper contact and thread form accuracy.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Series\u003c\/strong\u003e: CoroThread 266\u003c\/li\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: 1135\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\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\u003eChipbreaker\u003c\/strong\u003e: F\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\u003eInscribed Circle\u003c\/strong\u003e: 3\/8 inches (9.53 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e: 5\/32 inches (3.97 mm \/ 0.1563 inches decimal)\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\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: 5857580\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SANDVIK COROMANT","offers":[{"title":"Default Title","offer_id":51735263936818,"sku":"5857580","price":612.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/5929439e42fa52d950984d662a610ba4_327fca86-e904-4dd2-817b-a12beef17464.jpg?v=1788771176","url":"https:\/\/voomisupply.com\/products\/sandvik-coromant-5857580-threading-insert-20-tpi-un","provider":"Voomi Supply","version":"1.0","type":"link"}