{"product_id":"carmex-21e18unmt7-carbide-thread-mill-insert-18-tpi","title":"Carmex 21E18UNMT7 Carbide Thread Mill Insert 18 Tpi","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe CARMEX 21E18UNMT7 is a carbide thread milling insert engineered for external UN thread applications. It carries the MT7 grade designation with a TiAlN finish, a submicron carbide substrate, and is rated at 18 teeth per inch. The insert style code is 21E with an insert size code of 21. This is a single-point thread milling insert intended for use in CNC machining centers where thread milling is preferred over tapping, particularly in hard materials or blind-hole situations. Installation and tooling setup is performed by machinists and CNC programmers working to ANSI B1.1-1989 UN thread standards.\u003c\/p\u003e\n\u003cp\u003eThis insert is designed for external thread milling operations following the UN thread standard, conforming to ANSI B1.1-1989. At 18 TPI, it suits a range of inch-series fastener thread profiles commonly found in industrial, mechanical, and structural assemblies. The TiAlN coating provides heat resistance suited to dry or semi-dry cutting conditions in steel, stainless, and similar alloys. Minimum order quantity is 5 inserts; package quantity is 1.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSubmicron carbide substrate for edge stability in demanding materials\u003c\/li\u003e\n  \u003cli\u003eMT7 manufacturer grade with TiAlN finish for high-temperature wear resistance\u003c\/li\u003e\n  \u003cli\u003e18 TPI external UN thread profile per ANSI B1.1-1989\u003c\/li\u003e\n  \u003cli\u003eInsert style 21E, non-conical geometry\u003c\/li\u003e\n  \u003cli\u003e0.185 inch insert thickness\u003c\/li\u003e\n  \u003cli\u003eCertified to ISO 9001:2015, ISO 14001:2015, ISO 13485:2016, ISO 45001, and CE standards\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement insert for thread milling toolholders that accept the 21E insert style. Verify toolholder seat geometry and insert size code 21 compatibility before installation.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThread milling inserts are installed and indexed by qualified machinists or CNC tooling technicians. Power down and lock out the spindle before seating or indexing any insert. Use the manufacturer-specified torque wrench and clamping screw for the toolholder; do not over-tighten by hand. Confirm thread program lead, helical interpolation direction, and TPI settings in the CNC controller before cutting.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Style\u003c\/strong\u003e: 21E\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Size Code\u003c\/strong\u003e: 21\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Material\u003c\/strong\u003e: Carbide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: Submicron\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Grade\u003c\/strong\u003e: MT7\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: TiAlN\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Type\u003c\/strong\u003e: External\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UN\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThreads Per Inch\u003c\/strong\u003e: 18\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTeeth Per Inch\u003c\/strong\u003e: 18\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConical\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e: 0.185 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eANSI Code\u003c\/strong\u003e: ANSI B1.1-1989\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: CE, ISO 9001:2015, ISO 13485:2016, ISO 14001:2015, ISO 45001\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: CARMEX\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 21E18UNMT7\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"CARMEX","offers":[{"title":"Default Title","offer_id":52052706165042,"sku":"21E18UNMT7","price":597.12,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6de6a34dad7accb89e3ff1e098c54214.jpg?v=1790035713","url":"https:\/\/voomisupply.com\/products\/carmex-21e18unmt7-carbide-thread-mill-insert-18-tpi","provider":"Voomi Supply","version":"1.0","type":"link"}