{"product_id":"kennametal-1743987-threading-insert-8-tpi-stub-acme-kc5025","title":"Kennametal 1743987 Threading Insert 8 Tpi Stub Acme KC5025","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe KENNAMETAL 1743987 is a solid carbide laydown threading insert designed for cutting internal Stub Acme threads on a lathe or threading machine. Running on a PVD-applied TiAlN coating over a KC5025 grade carbide substrate, it delivers wear resistance and edge integrity on difficult-to-machine materials including steel, stainless steel, cast iron, superalloys, and titanium. The insert produces right-hand internal threads at 8 threads per inch (TPI) to the Stub Acme thread standard, with a 3\/8 inch (9.53 mm) inscribed circle and a thickness of 0.1430 inches (3.44 mm). It is intended for installation by machinists and CNC turning center operators in production or job-shop environments.\u003c\/p\u003e\n\u003cp\u003eThis insert is suited for internal threading operations on lathes and turning centers where Stub Acme thread forms are required. Stub Acme threads are common in power-transmission components, lead screws, and actuator assemblies. The ISO code LT16NR8STACME identifies the insert geometry, size, hand, and thread form, and the insert fits toolholders designed around the NR style size 16 laydown insert seat. The KC5025 grade is formulated for a broad range of workpiece materials, making this insert adaptable across mixed-production schedules involving ferrous and high-temperature alloys.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSolid carbide construction with KC5025 grade for durability across steel, stainless steel, cast iron, superalloys, and titanium\u003c\/li\u003e\n  \u003cli\u003eTiAlN coating applied via PVD process for elevated heat resistance and extended tool life\u003c\/li\u003e\n  \u003cli\u003eRight-hand internal Stub Acme thread form at 8 TPI\u003c\/li\u003e\n  \u003cli\u003e3\/8 inch inscribed circle (9.53 mm) in NR size 16 laydown insert geometry\u003c\/li\u003e\n  \u003cli\u003eThickness of 0.1430 inches (3.44 mm) for consistent seating in compatible toolholders\u003c\/li\u003e\n  \u003cli\u003eHole diameter of 0.1551 inches (3.94 mm) for mechanical clamping\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned to seat in NR style size 16 laydown threading toolholders configured for internal Stub Acme thread inserts. Confirm holder compatibility using the ISO designation LT16NR8STACME before installation.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by qualified machinists or CNC tooling technicians. Power down and lock out the machine spindle before changing inserts. Use the correct torx or clamp screw driver to secure the insert to the manufacturer-specified clamping method for the holder — do not overtighten. Verify insert seating and alignment before resuming cutting operations.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Style\u003c\/strong\u003e: NR Laydown\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Size Code\u003c\/strong\u003e: 16\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eISO Code\u003c\/strong\u003e: LT16NR8STACME\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Type\u003c\/strong\u003e: Internal\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: Stub Acme\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThreads Per Inch\u003c\/strong\u003e: 8 TPI\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Hand\u003c\/strong\u003e: Right Hand\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\u003eInscribed Circle\u003c\/strong\u003e: 3\/8 inch (9.53 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e: 0.1430 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: 0.0550 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFace of Insert to Tip Centerline\u003c\/strong\u003e: 0.0590 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Materials\u003c\/strong\u003e: Steel, Stainless Steel, Cast Iron, Superalloys, Titanium\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 23291804\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.0106 pounds\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: KENNAMETAL\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 1743987\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KENNAMETAL","offers":[{"title":"Default Title","offer_id":51755776475442,"sku":"1743987","price":628.69,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/e7e5ce2e01584b2d55d190052a3cc4b7.jpg?v=1788959565","url":"https:\/\/voomisupply.com\/products\/kennametal-1743987-threading-insert-8-tpi-stub-acme-kc5025","provider":"Voomi Supply","version":"1.0","type":"link"}