{"product_id":"osg-1664500411-thread-mill-5-16-unc-4-flute-solid-carbide","title":"Osg 1664500411 Thread Mill 5\/16 Unc 4 Flute Solid Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 1664500411 is a helical flute thread mill designed for cutting 5\/16 UNC internal threads in solid carbide construction with a DUROREY coating. It features 4 flutes and a long-reach thread mill geometry, making it well-suited for precise thread milling operations in ferrous and non-ferrous materials. The cutting diameter is 0.224 inches with a length of cut of 0.1667 inches and an overall length of 3.5 inches. A 3\/8-inch shank diameter provides rigid tool holding. Coolant-through capability supports chip evacuation during deep or tight-tolerance thread milling cuts. This tool is installed by machinists and CNC operators working in production or job-shop environments.\u003c\/p\u003e\u003cp\u003eThis thread mill is used in CNC machining centers for generating 5\/16 UNC threads at 18 teeth per inch. The long-reach design allows access to threads in recessed or deep-pocket features where standard-length tools cannot reach. It is appropriate for use in aerospace, automotive, tooling, and general metalworking applications where thread accuracy and surface finish are critical. The helical flute geometry improves chip flow and reduces cutting forces compared to straight-flute designs.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSolid carbide construction for rigidity and wear resistance\u003c\/li\u003e\n\u003cli\u003eDUROREY coating for extended tool life in ferrous materials\u003c\/li\u003e\n\u003cli\u003eCoolant-through design aids chip evacuation in deep thread features\u003c\/li\u003e\n\u003cli\u003eLong-reach thread mill type for access to recessed thread locations\u003c\/li\u003e\n\u003cli\u003e4 helical flutes for improved chip flow and reduced cutting forces\u003c\/li\u003e\n\u003cli\u003e18 TPI cutting profile matched to 5\/16 UNC thread standard\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for CNC machining centers capable of helical interpolation; compatible with 3\/8-inch tool holders and collet chucks used in standard milling setups for 5\/16 UNC thread milling applications.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThread mills of this type are installed by qualified CNC machinists and require a machining center with helical interpolation capability. Confirm tool holder runout is within acceptable tolerance before running to protect the carbide cutting edges. Do not use in manual milling machines. Always verify thread pitch programming matches the 18 TPI specification before cutting.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 5\/16 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Type\u003c\/strong\u003e: UNC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTeeth Per Inch\u003c\/strong\u003e: 18\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Diameter\u003c\/strong\u003e: 0.224 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 0.1667 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\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\/Finish\u003c\/strong\u003e: DUROREY\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Dimensions\u003c\/strong\u003e: 3.05 inches L x 0.55 inches W x 0.45 inches H\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.16 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 16645\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 27112806\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\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: 1664500411\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51731299270962,"sku":"1664500411","price":477.36,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/1738868886c9251aacaa093a2729fabf_06403b95-c39a-4bc7-969b-2c12536d27f6.jpg?v=1788729456","url":"https:\/\/voomisupply.com\/products\/osg-1664500411-thread-mill-5-16-unc-4-flute-solid-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}