{"product_id":"scientific-cutting-tools-tm345-20h-thread-mill-7-16-20-unf","title":"Scientific Cutting Tools TM345-20H Thread Mill 7\/16-20 Unf","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SCIENTIFIC CUTTING TOOLS TM345-20H is a solid carbide helical flute thread mill designed for cutting 7\/16-20 UNF threads in both internal and external applications. Built from submicron-grade carbide, it delivers the rigidity and wear resistance required for precision threading on hardened and difficult-to-machine materials. The tool runs four right-hand flutes with a 0.345-inch cutting diameter and a 0.82-inch length of cut, making it well suited for shallow-to-moderate thread depth requirements in production and job-shop environments. Machinists and CNC operators rely on this style of thread mill when a single tool must handle both internal bores and external thread profiles without a tool change.\u003c\/p\u003e\u003cp\u003eThis thread mill is used in CNC machining centers running helical interpolation programs. It fits applications where standard taps are impractical, such as blind holes with minimal thread runout clearance, materials prone to tap breakage, or setups requiring a single tool to cover a range of thread depths. The 3\/8-inch shank diameter accommodates standard end-mill holders and collet chucks found on most vertical and horizontal machining centers. At 3.5 inches overall length, it provides adequate reach for most workpiece fixturing configurations without excessive overhang.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCuts 7\/16-20 UNF threads in both internal and external configurations with a single tool\u003c\/li\u003e\n\u003cli\u003eSubmicron-grade solid carbide construction for extended tool life on hardened and abrasive materials\u003c\/li\u003e\n\u003cli\u003eFour right-hand helical flutes for efficient chip evacuation during thread milling cycles\u003c\/li\u003e\n\u003cli\u003eBright\/uncoated finish suitable for use with cutting fluid in a wide range of workpiece materials\u003c\/li\u003e\n\u003cli\u003e3\/8-inch shank fits standard collet chucks and end-mill holders without special tooling\u003c\/li\u003e\n\u003cli\u003eNo coolant-through requirement simplifies setup on machines without high-pressure coolant systems\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use on CNC machining centers capable of helical interpolation, compatible with any machine tool accepting a 3\/8-inch straight shank via collet or end-mill holder for 7\/16-20 UNF thread milling operations.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and operation should be performed by a qualified CNC machinist or tooling technician. Secure the shank fully in a balanced collet chuck or end-mill holder and verify runout before cutting. Always confirm the CNC program uses the correct helical interpolation cutter compensation offset for the 0.345-inch cutting diameter. Inspect the tool for chipping or wear before each production run and replace at the first sign of edge degradation to maintain thread quality.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 7\/16-20\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNF\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Type\u003c\/strong\u003e: Internal and External\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTeeth Per Inch\u003c\/strong\u003e: 20 TPI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Diameter\u003c\/strong\u003e: 0.345 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 0.82 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Nominal Diameter\u003c\/strong\u003e: 0.4375 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.375 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: Submicron\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Bright\/Uncoated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: SCIENTIFIC CUTTING TOOLS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: TM345-20H\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SCIENTIFIC CUTTING TOOLS","offers":[{"title":"Default Title","offer_id":52103630651698,"sku":"TM345-20H","price":285.26,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/0f854e537ced7baf71de7687da70f070.jpg?v=1790071386","url":"https:\/\/voomisupply.com\/products\/scientific-cutting-tools-tm345-20h-thread-mill-7-16-20-unf","provider":"Voomi Supply","version":"1.0","type":"link"}