{"product_id":"harvey-tool-987144-c3-thread-mill-1-4-20-internal-3-flute-carbide","title":"Harvey Tool 987144-C3 Thread Mill 1\/4-20 Internal 3 Flute Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HARVEY TOOL 987144-C3 is a helical flute thread mill designed for cutting internal 1\/4-20 threads in a CNC milling environment. Built from solid carbide and coated with AlTiN (aluminum titanium nitride), this tool delivers consistent thread form and extended tool life in ferrous and hardened materials. It runs a 0.1950-inch cutting diameter with a 0.7500-inch length of cut, and the 1\/4-inch shank fits standard collet chucks and end mill holders. Three helical flutes promote chip evacuation and reduce cutting forces during the threading pass. CNC machinists and toolroom operators use this tool in production and precision machining applications.\u003c\/p\u003e\n\u003cp\u003eThis thread mill is suited for internal 1\/4-20 UNC thread production in materials including steel, stainless steel, cast iron, and similar alloys where AlTiN coating provides thermal resistance and wear protection. At 2.5 inches overall length with a 1\/4-inch shank diameter, it fits VMCs and HMCs with standard toolholding. It is used in job shops, aerospace machining cells, and production environments where thread milling is preferred over tapping for accuracy control, thread depth flexibility, or difficult-to-machine materials. Coolant-through is not supported on this tool.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eCuts internal 1\/4-20 UNC threads at 20 teeth per inch\u003c\/li\u003e\n  \u003cli\u003eSolid carbide construction for rigidity and dimensional stability\u003c\/li\u003e\n  \u003cli\u003eAlTiN coating extends tool life in high-heat and abrasive cutting conditions\u003c\/li\u003e\n  \u003cli\u003eThree helical flutes support chip flow and reduce cutting load\u003c\/li\u003e\n  \u003cli\u003e0.1950-inch cutting diameter with 0.7500-inch length of cut\u003c\/li\u003e\n  \u003cli\u003eNo coolant-through — external coolant or air blast applies\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in CNC milling machines with standard 1\/4-inch collet or end mill toolholding; suitable for internal 1\/4-20 UNC thread milling applications where the minimum nominal bore diameter is 1\/4 inch.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation and operation of this tool should be performed by a qualified CNC machinist or toolroom professional. Secure the 1\/4-inch shank in a properly sized, clean collet or end mill holder and verify runout before cutting. Program helical interpolation at the correct thread pitch; do not use this tool as a standard end mill or tap. Follow machine tool builder guidelines and applicable shop safety procedures when setting speeds and feeds for solid carbide tooling.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/4-20 UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Type\u003c\/strong\u003e: Internal\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTeeth Per Inch\u003c\/strong\u003e: 20 TPI\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 3\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCutting Diameter\u003c\/strong\u003e: 0.1950 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 0.7500 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.2500 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMinimum Nominal Diameter\u003c\/strong\u003e: 0.2500 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.5000 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: AlTiN\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.06 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 23242117\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: HARVEY TOOL\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 987144-C3\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HARVEY TOOL","offers":[{"title":"Default Title","offer_id":51744617300274,"sku":"987144-C3","price":289.34,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/5cd14ea8e8bcad397794240293203429_4c89813b-867a-48b6-a411-d8862c060e79.jpg?v=1788859056","url":"https:\/\/voomisupply.com\/products\/harvey-tool-987144-c3-thread-mill-1-4-20-internal-3-flute-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}