{"product_id":"osg-1296900-spiral-flute-extension-tap-8-32-unc-h3","title":"Osg 1296900 Spiral Flute Extension Tap 8-32 Unc H3","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 1296900 is a spiral flute extension tap designed for threading 8-32 UNC holes in a wide range of metalworking applications. Built from high-speed steel with a bright, uncoated finish, it features a 50-degree helix angle and a bottoming chamfer for threading close to the bottom of blind holes. The overall length of 6 inches provides the reach needed for deep or obstructed workpieces. With an H3 thread limit and a 2B class of fit, this tap produces threads within standard tolerance ranges suitable for general mechanical assembly work. Three flutes channel chips efficiently while the spiral geometry pulls chips up and out of the hole during operation.\u003c\/p\u003e\u003cp\u003eThis extension tap is suited for production and maintenance threading operations in aluminum, carbon steel, and cast iron. The extended reach makes it practical for threading recessed bosses, deep cavities, or locations where a standard-length tap cannot reach with conventional tooling setups. It is commonly used with a tapping machine, CNC machining center, or hand tap wrench. The reduced shank and 6-inch OAL make it compatible with standard tap holders designed for this thread size range.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eBottoming chamfer allows threading to the bottom of blind holes\u003c\/li\u003e\n\u003cli\u003e50-degree helix angle promotes efficient chip evacuation in spiral flute operation\u003c\/li\u003e\n\u003cli\u003eH3 thread limit with 2B class of fit for standard-tolerance fastener assembly\u003c\/li\u003e\n\u003cli\u003eHigh-speed steel construction suitable for aluminum, carbon steel, and cast iron\u003c\/li\u003e\n\u003cli\u003e6-inch overall length provides extended reach for deep or obstructed tap locations\u003c\/li\u003e\n\u003cli\u003eReduced shank with square drive end for positive engagement in standard tap holders\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in materials including aluminum, carbon steel, and cast iron. Produces 8-32 UNC right-hand internal threads with a 2B class of fit. Compatible with standard tap holders and collet systems sized for the 0.168-inch shank diameter.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a machinist or maintenance technician familiar with tapping operations. Ensure the workpiece is securely fixtured and the tap is properly aligned with the drilled pilot hole before applying torque. Use appropriate cutting fluid for the material being tapped to extend tool life and improve thread quality. Reverse the tap periodically to break chips when hand tapping in steel or cast iron.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 8-32\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClass of Fit\u003c\/strong\u003e: 2B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Spiral Flute\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\u003eChamfer\u003c\/strong\u003e: Bottoming\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 6 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.75 inches (3\/4 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNeck Length\u003c\/strong\u003e: 0.83 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.168 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquare Size\u003c\/strong\u003e: 0.131 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquare Length\u003c\/strong\u003e: 0.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReduced Shank\u003c\/strong\u003e: Yes\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: Bright\/Uncoated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Application\u003c\/strong\u003e: Aluminum, Carbon Steel, Cast Iron\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 918\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.05 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: 1296900\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51743675973938,"sku":"1296900","price":112.28,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/f7eebb6d24274a2bd19b31f572a47069.jpg?v=1788849213","url":"https:\/\/voomisupply.com\/products\/osg-1296900-spiral-flute-extension-tap-8-32-unc-h3","provider":"Voomi Supply","version":"1.0","type":"link"}