{"product_id":"osg-1664700009-thread-mill-4-40-unc-2-flute-solid-carbide","title":"Osg 1664700009 Thread Mill 4-40 Unc 2 Flute Solid Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe OSG 1664700009 is a solid carbide helical flute thread mill designed to cut 4-40 UNC internal threads in a single helical pass. With a 0.083-inch cutting diameter and a 40-tooth-per-inch pitch, it is built for small-diameter thread milling in tight-tolerance machining applications. The DLC-IGUSS coating reduces friction and extends tool life in demanding materials. The long-reach mill type and left-hand flute direction suit CNC machining centers where climb milling and chip evacuation are priorities. Machinists and toolroom technicians are the primary installers of this tooling.\u003c\/p\u003e\n\u003cp\u003eThis thread mill is used in precision machining environments where tapping is impractical or where thread quality demands are high. The 0.25-inch straight-cylindrical shank fits standard ER collet chucks and end mill holders on CNC machining centers. The 0.125-inch length of cut and 2-inch overall length give access to shallow thread depths in small bores. Typical applications include aerospace, medical device, and precision instrument components where 4-40 UNC threads are specified.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSolid carbide construction for rigidity and wear resistance in hardened and abrasive materials\u003c\/li\u003e\n  \u003cli\u003eDLC-IGUSS coating reduces friction and extends tool life in dry or minimal-lubrication cutting\u003c\/li\u003e\n  \u003cli\u003eLeft-hand helical flute direction supports climb milling and efficient chip evacuation\u003c\/li\u003e\n  \u003cli\u003eLong-reach mill type provides access to threads in recessed or hard-to-reach bore locations\u003c\/li\u003e\n  \u003cli\u003e0.083-inch cutting diameter sized for 4-40 UNC thread form at 40 TPI\u003c\/li\u003e\n  \u003cli\u003eh6 shank diameter tolerance ensures consistent runout in precision collet and end mill holder setups\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for CNC machining centers capable of helical interpolation; fits 0.25-inch straight-cylindrical collet chucks and end mill holders; suited for cutting 4-40 UNC threads per the UNC thread standard.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation and use should be performed by qualified machinists on CNC machining centers with helical interpolation capability. Verify spindle speed, feed rate, and helical pitch in the CAM program before cutting. Secure the shank fully in a precision collet or end mill holder to minimize runout. Inspect the cutting edges before each use and replace at first sign of chipping or wear to maintain thread quality.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 4-40\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Type\u003c\/strong\u003e: UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTeeth Per Inch\u003c\/strong\u003e: 40 TPI\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCutting Diameter\u003c\/strong\u003e: 0.083 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 0.125 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.25 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter Tolerance\u003c\/strong\u003e: h6\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Direction\u003c\/strong\u003e: Left Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Mill Type\u003c\/strong\u003e: Long Reach\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: DLC-IGUSS\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: 0.05 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 23291800\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: OSG\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 1664700009\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51740968976690,"sku":"1664700009","price":320.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/853d8cbe57c17a094356a5d695d880f5.jpg?v=1788828671","url":"https:\/\/voomisupply.com\/products\/osg-1664700009-thread-mill-4-40-unc-2-flute-solid-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}