{"product_id":"osg-1012102-straight-flute-tap-4-40-unc-hss","title":"Osg 1012102 Straight Flute Tap 4-40 Unc Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 1012102 is a straight flute tap designed to cut internal 4-40 UNC threads in a wide range of metallic workpiece materials. Built from high-speed steel (HSS), it features a taper chamfer that progressively engages the material to ease thread starting and reduce stress on the tool. With 3 flutes, an H2 thread limit, and a right-hand thread direction, this tap suits standard machine tapping and hand tapping operations. The overall length is 1.875 inches with a thread length of 0.5625 inches. It carries a 2B and 3B class of fit, making it appropriate for both standard and close-tolerance threaded assemblies. Machinists, tool-and-die makers, and maintenance technicians are the primary users.\u003c\/p\u003e\u003cp\u003eThis tap is suited for tapping 4-40 UNC threaded holes in both production and repair settings. It performs in general machining shops, maintenance facilities, and light manufacturing environments. The taper chamfer makes it well-suited for through-hole applications where progressive thread engagement is preferred. It is part of the OSG Series 102 straight flute tap line and is sold individually.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e4-40 UNC thread form with right-hand thread direction\u003c\/li\u003e\n\u003cli\u003eTaper chamfer for progressive thread engagement and easier starting\u003c\/li\u003e\n\u003cli\u003eHigh-speed steel construction for durability across a broad range of metals\u003c\/li\u003e\n\u003cli\u003eH2 thread limit for consistent dimensional accuracy\u003c\/li\u003e\n\u003cli\u003e2B and 3B class of fit for standard and close-tolerance applications\u003c\/li\u003e\n\u003cli\u003e3-flute design for efficient chip clearance in short-chipping materials\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for tapping aluminum, cast aluminum, cast iron, high-carbon steel, low-carbon steel, and medium-carbon steel workpieces requiring 4-40 UNC internal threads.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis tap is installed and operated by machinists or maintenance technicians using a tap wrench, tapping head, or CNC machine spindle. Secure the workpiece firmly and ensure the tap is properly aligned with the drilled hole before engagement to avoid tap breakage. Apply appropriate cutting fluid for the workpiece material to extend tool life and improve thread quality. Do not reverse the tap abruptly  -  back off periodically to break chips when hand tapping.\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 Type\u003c\/strong\u003e: Taper\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClass of Fit\u003c\/strong\u003e: 2B, 3B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.5625 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length (OAL)\u003c\/strong\u003e: 1.875 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: High-Speed Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\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: 1012102\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51743980716338,"sku":"1012102","price":26.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/5710d503e0b35c81e42591b6b0aa4eda.jpg?v=1788852342","url":"https:\/\/voomisupply.com\/products\/osg-1012102-straight-flute-tap-4-40-unc-hss","provider":"Voomi Supply","version":"1.0","type":"link"}