{"product_id":"osg-2984501-spiral-flute-tap-3-48-unc-bottoming-hss","title":"Osg 2984501 Spiral Flute Tap 3-48 Unc Bottoming Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 2984501 is a spiral flute bottoming tap designed for threading 3-48 UNC holes in aluminum and carbon steel workpieces. Manufactured from high-speed steel with a steam oxide coating, it features a 2-flute right-hand spiral design with a 50-degree helix angle that efficiently evacuates chips during tapping operations. The bottoming chamfer allows threading close to the bottom of blind holes. At 1.813 inches overall length with a 0.141-inch shank diameter, this tap fits standard tap handles and machines used in precision machining, toolroom work, and production environments.\u003c\/p\u003e\u003cp\u003eThis tap is suited for threading small-diameter 3-48 UNC blind holes in aluminum and carbon steel. The spiral flute geometry is particularly effective in softer materials where chip packing is a concern. It is used by machinists, tool-and-die makers, and maintenance technicians requiring accurate internal threads in confined or shallow-bottomed bores. The steam oxide finish provides a degree of lubricity and mild corrosion resistance during storage and use.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e3-48 UNC thread form with right-hand thread direction\u003c\/li\u003e\n\u003cli\u003eBottoming chamfer for threading close to the bottom of blind holes\u003c\/li\u003e\n\u003cli\u003e2-flute spiral design at 50-degree helix angle for efficient chip evacuation\u003c\/li\u003e\n\u003cli\u003eHigh-speed steel construction for durability across aluminum and carbon steel applications\u003c\/li\u003e\n\u003cli\u003eSteam oxide coating adds lubricity and mild corrosion resistance\u003c\/li\u003e\n\u003cli\u003e2B class of fit for standard tolerance internal threads\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for cutting 3-48 UNC internal threads in aluminum and carbon steel. Fits standard tap handles and CNC or manual tapping setups with a 0.141-inch shank diameter.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis tap is installed and operated by machinists or maintenance technicians using a standard tap wrench or machine tapping setup. Ensure the workpiece is securely fixtured and the correct pilot hole size for 3-48 UNC is drilled prior to tapping. Use cutting fluid appropriate to the workpiece material to extend tool life and improve thread quality. Do not force the tap if resistance increases sharply, as small-diameter taps are susceptible to breakage under torsional overload.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 3-48 UNC\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: 2B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Style\u003c\/strong\u003e: Spiral\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHelix Angle\u003c\/strong\u003e: 50 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChamfer\u003c\/strong\u003e: Bottoming\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThreads per Inch\u003c\/strong\u003e: 48\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 1.813 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.496 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\u003eNeck Length\u003c\/strong\u003e: 0.535 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\u003eMaterial\u003c\/strong\u003e: 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: Aluminum, Carbon Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOversize\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.005 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: 2984501\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51752469102898,"sku":"2984501","price":45.06,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/41352d7bcc10c063aeb6404b10decde5.jpg?v=1788928334","url":"https:\/\/voomisupply.com\/products\/osg-2984501-spiral-flute-tap-3-48-unc-bottoming-hss","provider":"Voomi Supply","version":"1.0","type":"link"}