{"product_id":"kennametal-1743909-threading-insert-28-tpi-un-kc5025","title":"Kennametal 1743909 Threading Insert 28 Tpi Un KC5025","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe KENNAMETAL 1743909 is a laydown-style solid carbide threading insert designed for cutting internal UN threads. It carries the ISO designation LT16NR28UN and is manufactured to Kennametal grade KC5025 with a PVD-applied TiAlN coating. The insert is configured for right-hand cutting at 28 threads per inch (TPI) and fits a 3\/8-inch inscribed circle seat. At 0.143 inches thick, it is built for rigid, high-repeatability threading operations on CNC lathes and turning centers. Licensed machinists and toolroom professionals install this insert as part of a qualified laydown threading toolholder system.\u003c\/p\u003e\u003cp\u003eThis insert is suited for internal threading in steel, stainless steel, cast iron, superalloys, and titanium. It is a common choice for production threading where consistent thread form and tool life across high volumes are required. The KC5025 grade with TiAlN finish is optimized for interrupted cuts and elevated cutting temperatures typical of difficult-to-machine materials. The NR insert style and 28 TPI pitch target fine-thread applications in standard UN inch thread systems.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSolid carbide construction with PVD TiAlN coating for wear and heat resistance\u003c\/li\u003e\n\u003cli\u003e28 TPI UN internal thread form, right-hand orientation\u003c\/li\u003e\n\u003cli\u003eKC5025 grade rated for steel, stainless steel, cast iron, superalloys, and titanium\u003c\/li\u003e\n\u003cli\u003e3\/8-inch (9.53 mm) inscribed circle for standard LT16 laydown toolholder seats\u003c\/li\u003e\n\u003cli\u003eThickness of 0.143 inches (3.44 mm) for precise laydown seating and repeatability\u003c\/li\u003e\n\u003cli\u003e0.155-inch hole diameter for positive toolholder retention\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement threading insert for LT16-series laydown threading toolholders accepting a 3\/8-inch inscribed circle insert with NR geometry.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis insert is installed by machinists or toolroom technicians into a qualified LT16 laydown threading toolholder. Power down and lock out the machine spindle before changing inserts. Use the correct torque wrench and manufacturer-specified clamping screw to secure the insert; avoid overtightening the retention screw. Verify thread pitch and hand orientation against the workpiece drawing before starting the threading cycle.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO Code\u003c\/strong\u003e: LT16NR28UN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Style\u003c\/strong\u003e: NR\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: KC5025\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: 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: UN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Type\u003c\/strong\u003e: Internal\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: 28\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: 0.143 inches (3.44 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHole Diameter\u003c\/strong\u003e: 0.1551 inches (3.94 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Edge to Theoretical Edge Length\u003c\/strong\u003e: 0.0240 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFace of Insert to Tip Centerline\u003c\/strong\u003e: 0.0270 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Steel, Stainless Steel, Cast Iron, Superalloys, Titanium\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.009 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: KENNAMETAL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 1743909\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KENNAMETAL","offers":[{"title":"Default Title","offer_id":51730281726258,"sku":"1743909","price":620.18,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/29457fb7a40de0b7a838e99cead75696.jpg?v=1788714590","url":"https:\/\/voomisupply.com\/products\/kennametal-1743909-threading-insert-28-tpi-un-kc5025","provider":"Voomi Supply","version":"1.0","type":"link"}