{"product_id":"osg-1301901903-spiral-flute-tap-1-2-13-unc-cobalt","title":"Osg 1301901903 Spiral Flute Tap 1\/2-13 Unc Cobalt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe OSG 1301901903 is a 1\/2-13 UNC spiral flute tap designed for cutting right-hand internal threads in a modified bottoming configuration. Built from cobalt high-speed steel with a nitride finish, it handles tapping applications that demand heat and wear resistance. The 50-degree helix angle and 3-flute spiral geometry evacuate chips upward during the cut, making it well suited for blind-hole work where chip packing is a concern. At 3-3\/8 inches overall length with an H3 thread limit and 2B class of fit, this tap delivers consistent tolerance control in production and job-shop environments. Machinists and tool-and-die professionals are the primary users.\u003c\/p\u003e\n\u003cp\u003eThis tap is rated for aluminum material applications, where the spiral flute geometry and nitride coating reduce built-up edge and promote clean thread formation. The modified bottoming chamfer allows threading closer to the bottom of a blind hole than a standard plug tap. With 13 threads per inch on a 1\/2-13 UNC pitch, it covers one of the most common fastener sizes in general machining, maintenance, and repair work. Coolant-through is not available on this tap; external flood or mist coolant is the appropriate approach.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e50-degree helix angle promotes upward chip evacuation in blind holes\u003c\/li\u003e\n  \u003cli\u003eCobalt construction provides elevated heat and wear resistance versus standard HSS\u003c\/li\u003e\n  \u003cli\u003eNitride finish reduces friction and extends tool life in non-ferrous materials\u003c\/li\u003e\n  \u003cli\u003eModified bottoming chamfer for threading close to the bottom of blind holes\u003c\/li\u003e\n  \u003cli\u003eH3 thread limit with 2B class of fit for consistent tolerance in production runs\u003c\/li\u003e\n  \u003cli\u003eRight-hand flute and right-hand thread in a single unified configuration\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in standard 1\/2-13 UNC tapping applications on aluminum workpieces; suitable for use in CNC machining centers, drill presses, and tapping arms that accept a straight shank tap of 6.48 mm shank diameter.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by qualified machinists familiar with tapping procedures and speeds appropriate to cobalt spiral flute taps. Ensure the workpiece is securely fixtured and the tap is properly aligned before engaging the cut to prevent tap breakage. Power down all equipment before loading or changing tooling. Because coolant-through is not supported, apply adequate external coolant or cutting fluid to the tap and hole throughout the operation.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/2-13\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: 13\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\u003eHelix Angle\u003c\/strong\u003e: 50 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfer\u003c\/strong\u003e: Modified Bottoming\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClass of Fit\u003c\/strong\u003e: 2B\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\u003eFlute Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Cobalt\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Nitride\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Application\u003c\/strong\u003e: Aluminum\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3-3\/8 inches (63.50 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.614 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 6.48 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNeck Length\u003c\/strong\u003e: 25.40 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSquare Length\u003c\/strong\u003e: 0.4375 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSquare Size\u003c\/strong\u003e: 0.2750 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 0.367 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 13019\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.13 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 27112806\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: 1301901903\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51730740216114,"sku":"1301901903","price":105.13,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/f056c5a377637554897f940ae4fb2a2d_efad07f5-b706-46ec-831d-075cd7489660.jpg?v=1788722018","url":"https:\/\/voomisupply.com\/products\/osg-1301901903-spiral-flute-tap-1-2-13-unc-cobalt","provider":"Voomi Supply","version":"1.0","type":"link"}