{"product_id":"osg-1430001-spiral-flute-tap-1-4-20-unc-hss-oxide","title":"Osg 1430001 Spiral Flute Tap 1\/4-20 Unc Hss Oxide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe OSG 1430001 is a spiral flute tap designed for cutting internal threads in a wide range of metallic workpieces. It cuts a 1\/4-20 UNC right-hand thread and meets a 3B class of fit, making it appropriate for standard tolerance threaded holes in production and maintenance applications. The tap is manufactured from high-speed steel and finished with a steam oxide coating that provides mild lubricity and corrosion resistance during use. With a 50-degree helix angle and three flutes, it pulls chips up and out of the hole efficiently, which is particularly valuable when tapping blind holes. Overall length is 2.5 inches. This tap is installed by machinists, tool and die technicians, and maintenance mechanics working in metalworking, fabrication, and industrial repair settings.\u003c\/p\u003e\n\u003cp\u003eThe OSG 1430001 is suited for tapping aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel. It is a plug-chamfer design, meaning it requires a pre-existing through-hole or drilled blind hole and is not intended for starting threads from a solid surface without a lead hole. Typical applications include creating threaded fastener holes in machined components, repair of stripped threads, and production threading operations where a 1\/4-20 UNC thread form is required. The H3 thread limit ensures consistent fit with standard 3B tolerance hardware.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e1\/4-20 UNC thread form with right-hand thread direction and 3B class of fit\u003c\/li\u003e\n  \u003cli\u003e50-degree helix angle with spiral flute geometry for efficient chip evacuation in blind holes\u003c\/li\u003e\n  \u003cli\u003eHigh-speed steel construction for durability across a broad range of workpiece materials\u003c\/li\u003e\n  \u003cli\u003eSteam oxide coating provides mild lubrication and light corrosion resistance\u003c\/li\u003e\n  \u003cli\u003ePlug chamfer entry suitable for through-holes and blind holes with adequate clearance depth\u003c\/li\u003e\n  \u003cli\u003eH3 thread limit for consistent dimensional accuracy in standard tolerance applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel workpieces requiring a 1\/4-20 UNC internal thread to a 3B class of fit.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis tap is installed by machinists or maintenance mechanics using a tap wrench, tapping head, or machine spindle; power down all equipment and secure the workpiece before beginning. Drill the correct tap drill size for a 1\/4-20 UNC thread prior to tapping, and apply appropriate cutting fluid for the workpiece material to extend tool life. Do not force the tap if resistance increases sharply, as high-speed steel taps can fracture under excessive torque. Follow applicable shop safety standards and manufacturer feed rate recommendations for the machine being used.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\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\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\u003eChamfer\u003c\/strong\u003e: Plug\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 3\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Style\u003c\/strong\u003e: Spiral\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHelix Angle\u003c\/strong\u003e: 50 degrees\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: Steam Oxide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.645 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\u003eNeck Length\u003c\/strong\u003e: 1.7 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\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 107\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.029 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\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: 1430001\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51739736834354,"sku":"1430001","price":44.47,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/b1bcd883a4d7c6896d42e853619138ef.jpg?v=1788818377","url":"https:\/\/voomisupply.com\/products\/osg-1430001-spiral-flute-tap-1-4-20-unc-hss-oxide","provider":"Voomi Supply","version":"1.0","type":"link"}