{"product_id":"carmex-21e24unmt7-carbide-thread-mill-insert-24-tpi","title":"Carmex 21E24UNMT7 Carbide Thread Mill Insert 24 Tpi","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe CARMEX 21E24UNMT7 is a carbide thread mill insert designed for external UN thread milling at 24 teeth per inch (TPI). Built from submicron carbide in manufacturer grade MT7 with a TiAlN finish, this insert delivers consistent thread geometry and extended tool life in demanding machining environments. The 21E insert style is a single-profile design suited for CNC thread milling operations where precision and repeatability are critical. Thickness measures 0.185 inches. Machinists and tooling specialists working with unified national thread forms will find this insert a reliable production-grade option for external threading applications.\u003c\/p\u003e\u003cp\u003eThis insert is used in thread milling operations targeting external UN thread forms at 24 TPI. It is suited for use in CNC machining centers performing thread milling on ferrous and non-ferrous workpieces where a TiAlN-coated submicron carbide insert is specified. Typical applications include production threading in job shops, aerospace component machining, and general metalworking where consistent thread form accuracy is required across multiple parts.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSubmicron carbide substrate in MT7 grade for wear resistance and edge stability\u003c\/li\u003e\n\u003cli\u003eTiAlN finish for heat resistance and extended insert life at higher cutting speeds\u003c\/li\u003e\n\u003cli\u003e21E insert style for external UN thread profiles at 24 TPI\u003c\/li\u003e\n\u003cli\u003eNon-conical geometry for straightforward thread milling setups\u003c\/li\u003e\n\u003cli\u003eThickness of 0.185 inches for precise seating in compatible thread mill bodies\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or production insert for thread mill toolholders accepting the 21E insert style in external UN thread milling applications.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified machinist or tooling technician. Ensure the thread mill body and clamping mechanism are clean and free of chips before seating the insert. Power down and lock out the spindle before changing inserts. Follow the thread mill body manufacturer torque guidelines for the clamping screw to avoid insert movement or breakage during cutting.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Style\u003c\/strong\u003e: 21E\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\u003eTeeth Per Inch\u003c\/strong\u003e: 24 TPI\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\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\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: 21E24UNMT7\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"CARMEX","offers":[{"title":"Default Title","offer_id":52071718027570,"sku":"21E24UNMT7","price":597.12,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/dc6908409fb5b182fa48a7b3afcdafa2_7f20bf34-efd3-4b93-a4f2-56b276a7c5c9.jpg?v=1790049297","url":"https:\/\/voomisupply.com\/products\/carmex-21e24unmt7-carbide-thread-mill-insert-24-tpi","provider":"Voomi Supply","version":"1.0","type":"link"}