{"product_id":"hertel-g837651-extension-tap-1-2-13-hss-plug-4-flutes-h3","title":"Hertel G837651 Extension Tap 1\/2-13 Hss Plug 4 Flutes H3","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HERTEL G837651 is a 1\/2-13 UNC extension tap designed for threading operations that require reach beyond what a standard-length tap provides. Built from high speed steel with a bright\/uncoated finish, this plug chamfer tap delivers reliable thread-cutting performance in a range of ferrous and non-ferrous materials. The 4-flute geometry supports chip evacuation and stable tracking during through-hole and deep-hole tapping. The H3 thread limit and 3B class of fit make it well suited to production threading where consistent tolerance control is required. A reduced shank allows use in standard chuck setups. Machinists and toolroom technicians are the primary installers of this tooling.\u003c\/p\u003e\n\u003cp\u003eThis tap is used in machining centers, drill presses, and manual tapping setups where access depth demands an extended-length tool. The 1\/2-13 UNC thread profile covers a widely used fastener size in structural, mechanical, and machine assembly work. The plug chamfer style — with 3 to 5 chamfered threads — is the standard choice for through-hole applications and general-purpose threading where a starting chamfer is not required. Its 4-inch overall length provides additional reach compared to standard hand tap configurations.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e1\/2-13 UNC thread form with H3 thread limit for controlled tolerance output\u003c\/li\u003e\n  \u003cli\u003ePlug chamfer geometry suited to through-hole tapping applications\u003c\/li\u003e\n  \u003cli\u003e4-flute design promotes chip evacuation and tool stability\u003c\/li\u003e\n  \u003cli\u003eHigh speed steel construction provides durability across common workpiece materials\u003c\/li\u003e\n  \u003cli\u003eBright\/uncoated finish — no heat treatment or coating that could affect dimensional tolerance\u003c\/li\u003e\n  \u003cli\u003eReduced shank diameter of 0.367 inches allows use in standard tap chucks and holders\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or direct tooling selection for any application requiring a 1\/2-13 UNC plug chamfer extension tap with an H3 thread limit and 3B class of fit in standard tap holders or chucks accommodating a 0.367-inch reduced shank.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by qualified machinists or toolroom personnel. Ensure the spindle or tapping head is fully powered down and the workpiece is securely fixtured before installing or changing the tap. Verify chuck and holder compatibility with the 0.367-inch reduced shank before seating. Use appropriate cutting fluid for the workpiece material to prolong tool life and improve thread quality.\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\u003eThread Limit\u003c\/strong\u003e: H3\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClass of Fit\u003c\/strong\u003e: 3B\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfer Type\u003c\/strong\u003e: Plug\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.367 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\u003eWeight\u003c\/strong\u003e: 0.2 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: HERTEL\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: G837651\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51751091765554,"sku":"G837651","price":102.44,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6b38531b6c7df37969e6a1f4c7a3e3b9.jpg?v=1788921611","url":"https:\/\/voomisupply.com\/products\/hertel-g837651-extension-tap-1-2-13-hss-plug-4-flutes-h3","provider":"Voomi Supply","version":"1.0","type":"link"}