{"product_id":"osg-1765501-extension-tap-1-2-13-unc-spiral-point-vanadium-hss","title":"Osg 1765501 Extension Tap 1\/2-13 Unc Spiral Point Vanadium Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 1765501 is a spiral point plug extension tap designed for threading 1\/2-13 UNC holes in metalworking applications. Built from vanadium high-speed steel with a steam oxide finish, it provides wear resistance and lubricity during cutting. The plug chamfer style makes it well suited for through-hole threading operations. With an overall length of 6 inches and a reduced shank diameter of 0.367 inches, this tap reaches into deeper workpiece setups that a standard-length tap cannot access. The H3 thread limit holds close tolerances for 3B class of fit threads. Three right-hand flutes and a right-hand helix push chips forward ahead of the tap during the cut.\u003c\/p\u003e\u003cp\u003eThis tap is used in machine shop, maintenance, and fabrication environments where threading into carbon steel, hardened steel, or stainless steel is required. The extension length is useful when threading recessed bosses, deep flanges, or other features where a standard tap length would not reach the thread start. It is designed for use in CNC machining centers, drill presses, and tapping machines where the longer reach is necessary without sacrificing rigidity from the reduced shank profile.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSpiral point (gun tap) design pushes chips forward for clean through-hole threading\u003c\/li\u003e\n\u003cli\u003eVanadium high-speed steel construction for durability in carbon steel, hardened steel, and stainless steel\u003c\/li\u003e\n\u003cli\u003eSteam oxide finish reduces friction and improves chip flow\u003c\/li\u003e\n\u003cli\u003eH3 thread limit for accurate 3B class of fit tolerance control\u003c\/li\u003e\n\u003cli\u003e6 inch overall length with reduced shank for extended reach applications\u003c\/li\u003e\n\u003cli\u003ePlug chamfer style for through-hole starting and threading\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for threading 1\/2-13 UNC right-hand threads in carbon steel, hardened steel, and stainless steel workpieces. Suitable for use with standard 1\/2-13 tapping chucks and extension holders that accept a 0.367 inch shank diameter.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eExtension taps are installed and operated by qualified machinists using appropriate tapping chucks, floating holders, or rigid tapping setups on machine tools. Ensure the workpiece is securely clamped and the tap is correctly aligned to the pilot hole before initiating the cut. Use cutting fluid appropriate for the workpiece material to extend tap life and improve thread finish. Inspect the tap for wear or chipping before each use and replace when cutting performance degrades.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/2-13\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClass of Fit\u003c\/strong\u003e: 3B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChamfer\u003c\/strong\u003e: Plug\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHelix Angle\u003c\/strong\u003e: 0 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 6 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.921 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNeck Length\u003c\/strong\u003e: 1.354 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.367 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquare Size\u003c\/strong\u003e: 0.275 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquare Length\u003c\/strong\u003e: 0.4375 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReduced Shank\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Vanadium High-Speed Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Steam Oxide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Application\u003c\/strong\u003e: Carbon Steel, Hardened Steel, Stainless Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 397\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.192 pounds\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: 1765501\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51755163451698,"sku":"1765501","price":107.31,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/d50eb49d64d009b0836f02e9679f93cd.jpg?v=1788951713","url":"https:\/\/voomisupply.com\/products\/osg-1765501-extension-tap-1-2-13-unc-spiral-point-vanadium-hss","provider":"Voomi Supply","version":"1.0","type":"link"}