{"product_id":"osg-1220001-spiral-point-tap-1-4-20-unc-2-flute-hss","title":"Osg 1220001 Spiral Point Tap 1\/4-20 Unc 2 Flute Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe OSG 1220001 is a spiral point plug tap designed for threading 1\/4-20 UNC internal threads in production machining and maintenance applications. Built from high-speed steel with a steam oxide finish, it pushes chips forward ahead of the cutting action, keeping the flute path clear and reducing the risk of chip packing in through-hole applications. The two-flute spiral point geometry provides efficient chip evacuation at moderate feed rates. With a thread limit of H1 and right-hand thread direction, this tap is suited for close-tolerance threading work across a broad range of workpiece materials. The plug chamfer eases thread entry and distributes cutting load gradually across the leading threads.\u003c\/p\u003e\n\u003cp\u003eThis tap is used in through-hole threading operations on a wide range of materials including aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, high-carbon steel, and hardened steel. It is a common choice for machine shop production work, maintenance and repair threading, and light manufacturing environments where consistent 1\/4-20 UNC threads are required. It runs in CNC machining centers, drill presses, and tapping machines. Coolant-through is not supported, so external flood coolant or cutting fluid is recommended when tapping harder materials.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSpiral point geometry pushes chips forward for use in through-hole applications\u003c\/li\u003e\n  \u003cli\u003eHigh-speed steel construction provides toughness across a wide material range\u003c\/li\u003e\n  \u003cli\u003eSteam oxide coating reduces friction and provides light corrosion resistance during storage and use\u003c\/li\u003e\n  \u003cli\u003eH1 thread limit supports close-tolerance 1\/4-20 UNC thread production\u003c\/li\u003e\n  \u003cli\u003ePlug chamfer distributes cutting load across the lead threads for smooth entry\u003c\/li\u003e\n  \u003cli\u003eRight-hand thread direction, standard for the majority of fastener applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for threading 1\/4-20 UNC through-holes in aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, high-carbon steel, and hardened steel workpieces. Compatible with standard 1\/4-inch tap holders and collet chucks accepting a 0.255-inch shank diameter.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis tap should be installed by a machinist or qualified maintenance technician familiar with tapping operations and toolholder specifications. Ensure the workpiece is securely fixtured and the tapping axis is aligned with the drilled hole before engaging the tap. Apply an appropriate cutting fluid or tapping compound, particularly when working with steel or cast iron, to extend tool life and improve thread finish. Never force a tap that has stopped advancing, as high-speed steel taps are brittle under torsional overload and can fracture in the hole.\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\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: 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfer\u003c\/strong\u003e: Plug\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\u003eThread Limit\u003c\/strong\u003e: H1\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: 2.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.638 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\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 105\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.1 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: 1220001\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51744266780978,"sku":"1220001","price":25.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/65398680501eed073eebed0f73ce970c_8c940ec5-c9fe-4a4d-9819-f7d387ca6865.jpg?v=1788855433","url":"https:\/\/voomisupply.com\/products\/osg-1220001-spiral-point-tap-1-4-20-unc-2-flute-hss","provider":"Voomi Supply","version":"1.0","type":"link"}