{"product_id":"osg-1120008-straight-flute-tap-1-4-20-unc-ticn-hss","title":"Osg 1120008 Straight Flute Tap 1\/4-20 Unc Ticn Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 1120008 is a straight flute tap designed for cutting 1\/4-20 UNC internal threads in a wide range of ferrous and non-ferrous workpiece materials. It is manufactured from high-speed steel with a TiCN (titanium carbonitride) coating that improves surface hardness and wear resistance for extended tool life. The tap features a taper chamfer, which distributes cutting load gradually across the leading threads and makes it well-suited for through-hole applications. With 4 flutes and an H3 thread limit, it holds close tolerances and meets 3B class of fit requirements. Machinists and toolroom technicians install this tap in drill presses, CNC machining centers, and hand tapping operations.\u003c\/p\u003e\u003cp\u003eThis tap is intended for production and maintenance tapping in aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel. Its straight flute geometry works best in through holes where chips can exit freely ahead of the tool. The taper chamfer entry makes it a reliable choice for starting threads squarely, particularly in manual and semi-automated setups where the operator controls feed alignment.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e1\/4-20 UNC thread form with right-hand thread direction\u003c\/li\u003e\n\u003cli\u003eTiCN coating increases surface hardness and reduces friction for longer tool life\u003c\/li\u003e\n\u003cli\u003eTaper chamfer distributes cutting forces across multiple leading threads for smooth entry\u003c\/li\u003e\n\u003cli\u003eH3 thread limit maintains 3B class of fit tolerances\u003c\/li\u003e\n\u003cli\u003e4 straight flutes support chip clearance in through-hole applications\u003c\/li\u003e\n\u003cli\u003eHigh-speed steel construction provides toughness across a broad range of workpiece materials\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style straight flute tap for through-hole 1\/4-20 UNC threading operations in aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel workpieces.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis tap is installed and used by machinists and toolroom technicians in drill presses, tapping machines, or by hand with a tap wrench. Always ensure the pilot hole is drilled to the correct tap drill diameter for 1\/4-20 UNC before beginning the tapping operation. Use appropriate cutting fluid for the workpiece material to reduce heat and extend tool life. Secure the workpiece firmly before tapping to prevent movement and thread misalignment.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/4-20 UNC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNC\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: Taper\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: 3B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 1 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.255 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquare Length\u003c\/strong\u003e: 0.3125 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquare Size\u003c\/strong\u003e: 0.191 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNeck Length\u003c\/strong\u003e: 1.1811 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\u003c\/strong\u003e: TiCN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Application\u003c\/strong\u003e: Aluminum, Cast Aluminum, Cast Iron, High-Carbon Steel, Low-Carbon Steel, Medium-Carbon Steel\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: 0.025 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: 1120008\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51737331335474,"sku":"1120008","price":28.55,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/2774ec0fdba8ea4098f6462b12abfacf_bc990c18-37b6-41ab-b973-875ae027b63e.jpg?v=1788787197","url":"https:\/\/voomisupply.com\/products\/osg-1120008-straight-flute-tap-1-4-20-unc-ticn-hss","provider":"Voomi Supply","version":"1.0","type":"link"}