{"product_id":"osg-1012201-straight-flute-tap-4-40-unc-hss-oxide","title":"Osg 1012201 Straight Flute Tap 4-40 Unc Hss Oxide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 1012201 is a straight flute tap designed for cutting 4-40 UNC internal threads in a range of metallic workpiece materials. It features three flutes with a plug chamfer, making it well suited for through-hole tapping applications where chips can be pushed ahead of the cutting edge. The tap is manufactured from high-speed steel with an oxide coating for added surface hardness and corrosion resistance. With an overall length of 1.875 inches and a thread length of 0.37 inches, this tap is compact enough for use in tight spaces. It is installed by machinists, tool-and-die makers, and maintenance technicians working in shop or field environments.\u003c\/p\u003e\u003cp\u003eThis tap is used for creating 4-40 UNC threads in aluminum, cast aluminum, cast iron, high-carbon steel, low-carbon steel, and medium-carbon steel workpieces. The plug chamfer entry makes it a standard choice for production tapping and general maintenance work. It is suitable for both machine tapping and careful hand tapping with an appropriate tap handle or machine spindle. The H2 thread limit designation ensures the finished threads fall within 2B and 3B class-of-fit tolerances, which are the standard fits for most fastener applications in these size ranges.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e4-40 UNC thread profile with right-hand thread direction\u003c\/li\u003e\n\u003cli\u003ePlug chamfer for through-hole tapping\u003c\/li\u003e\n\u003cli\u003eThree-flute straight design for chip clearing in through holes\u003c\/li\u003e\n\u003cli\u003eHigh-speed steel construction for durability across a range of metals\u003c\/li\u003e\n\u003cli\u003eOxide coating for improved surface hardness and corrosion resistance\u003c\/li\u003e\n\u003cli\u003eH2 thread limit for 2B and 3B class-of-fit accuracy\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eSuitable for tapping 4-40 UNC threads in aluminum, cast aluminum, cast iron, high-carbon steel, low-carbon steel, and medium-carbon steel workpieces. Part of OSG Series 102.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eSecure the workpiece firmly before tapping and ensure the tap is properly aligned with the drilled pilot hole to prevent tap breakage. Use appropriate cutting fluid or tapping compound for the workpiece material to extend tap life and improve thread finish. When machine tapping, set spindle speed according to the material being tapped and use a tapping head where reversing is required. Replace worn taps before thread quality degrades to avoid rework.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 4-40\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChamfer\u003c\/strong\u003e: Plug\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClass of Fit\u003c\/strong\u003e: 2B and 3B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: High-Speed Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: Oxide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThreads per Inch\u003c\/strong\u003e: 40\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 1.875 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.37 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.141 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquare Length\u003c\/strong\u003e: 0.1875 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquare Size\u003c\/strong\u003e: 0.11 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNeck Length\u003c\/strong\u003e: 0.6811 inches\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: 0.01 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 102\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: 1012201\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51732823376178,"sku":"1012201","price":19.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/0aea67f76d64c49fd8041c5cca4a66a3.jpg?v=1788747213","url":"https:\/\/voomisupply.com\/products\/osg-1012201-straight-flute-tap-4-40-unc-hss-oxide","provider":"Voomi Supply","version":"1.0","type":"link"}