{"product_id":"osg-1122808-straight-flute-tap-1-2-20-unf-ticn-hss","title":"Osg 1122808 Straight Flute Tap 1\/2-20 Unf Ticn Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 1122808 is a straight flute tap designed for cutting 1\/2-20 UNF internal threads in a range of ferrous and non-ferrous materials. Built from high-speed steel (HSS) with a titanium carbonitride (TiCN) coating, it delivers increased surface hardness and wear resistance compared to uncoated taps. The plug chamfer (3-5 threads) allows the tap to be started in a through-hole or a blind hole with adequate clearance. It carries a 3B class of fit and an H3 thread limit, producing threads within tight dimensional tolerances. Machinists, tool-and-die makers, and maintenance technicians reach for this tap in both production and repair applications.\u003c\/p\u003e\u003cp\u003eThe 1122808 is suited for through-hole and blind-hole threading in aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel. At 3-3\/8 inches overall length with a 1-21\/32 inch thread length, it fits standard tap handles, tapping heads, and CNC rigid-tapping setups. Right-hand thread direction is standard. The 4-flute straight configuration works best in materials that produce short, broken chips rather than long stringy ones, making it a practical choice for the listed ferrous and aluminum alloys.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e1\/2-20 UNF thread form, right-hand direction, 3B class of fit\u003c\/li\u003e\n\u003cli\u003eH3 thread limit for consistent, close-tolerance thread production\u003c\/li\u003e\n\u003cli\u003eTiCN coating increases hardness and reduces friction for longer tool life\u003c\/li\u003e\n\u003cli\u003e4 straight flutes suited to short-chipping aluminum and ferrous materials\u003c\/li\u003e\n\u003cli\u003ePlug chamfer starts easily in through-holes and blind holes with clearance\u003c\/li\u003e\n\u003cli\u003eNo coolant-through requirement  -  compatible with flood, mist, or paste lubricants\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in materials including aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel. Fits standard 1\/2-inch tap handles and tapping heads sized for the 0.367-inch shank diameter.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eTapping operations should be performed by a qualified machinist or maintenance technician following shop safety procedures. Secure the workpiece fully before starting; never tap freehand in a drill press without a proper tap guide or self-reversing tapping head. Apply an appropriate cutting fluid or tapping paste for the workpiece material before and during tapping to protect the tool edge and achieve a clean thread form. Inspect the tap for chipping or wear before each use, and back the tap out periodically to clear chips when working in blind holes.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/2-20 UNF\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNF\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThreads per Inch\u003c\/strong\u003e: 20\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChamfer Type\u003c\/strong\u003e: Plug\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\u003eOverall Length\u003c\/strong\u003e: 3-3\/8 inches (3.374 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 1-21\/32 inches (1.154 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\u003eNeck Length\u003c\/strong\u003e: 1.811 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: High-Speed Steel (HSS)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiCN (Titanium Carbonitride)\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\u003eSeries\u003c\/strong\u003e: 101\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.11 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Application\u003c\/strong\u003e: Aluminum, Cast Aluminum, Cast Iron, Low-Carbon Steel, Medium-Carbon Steel, High-Carbon Steel\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: 1122808\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51740099182898,"sku":"1122808","price":56.37,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/d131af0bcb8e5bbb866abc7d31d45fa8.jpg?v=1788822279","url":"https:\/\/voomisupply.com\/products\/osg-1122808-straight-flute-tap-1-2-20-unf-ticn-hss","provider":"Voomi Supply","version":"1.0","type":"link"}