{"product_id":"hertel-r837654-extension-plug-tap-1-2-13-unc-4-flute-hss","title":"Hertel R837654 Extension Plug Tap 1\/2-13 Unc 4 Flute Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HERTEL R837654 is a 1\/2-13 UNC extension plug tap ground from high speed steel and finished bright\/uncoated for general-purpose threading applications. With an 8-inch overall length, it provides the reach needed to thread holes in recessed or deep-cavity workpieces where a standard-length tap cannot access. The H3 thread limit and 4-flute geometry deliver consistent thread form and chip control in a wide range of materials. The 3B class of fit designation suits most standard fastener assemblies. A reduced shank measuring 0.367 inches in diameter allows use in standard tap holders and extension chucks. This tap is installed by machinists, tool and die makers, and maintenance trades working with UNC threads.\u003c\/p\u003e\u003cp\u003eThis extension tap is suited for threading operations in production machining, job shop, and maintenance-repair environments where 1\/2-13 UNC threads are required in deep or obstructed holes. The plug chamfer distributes cutting load across the first few threads, making it a practical choice for through-holes and moderately deep blind holes. Its bright, uncoated surface is compatible with most cutting fluids and performs reliably in ferrous and non-ferrous materials at standard cutting speeds.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eExtension length of 8 inches overall for reaching recessed or deep-cavity holes\u003c\/li\u003e\n\u003cli\u003ePlug chamfer for versatile use in through-holes and moderate-depth blind holes\u003c\/li\u003e\n\u003cli\u003eH3 thread limit for consistent fit in standard 3B tolerance assemblies\u003c\/li\u003e\n\u003cli\u003e4-flute design promotes chip control and thread accuracy\u003c\/li\u003e\n\u003cli\u003eReduced shank at 0.367 inches diameter fits standard extension tap holders\u003c\/li\u003e\n\u003cli\u003eHigh speed steel construction for durability across a broad range of workpiece materials\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a direct-fit extension plug tap for 1\/2-13 UNC threading operations using standard tap holders and extension chucks that accept a 0.367-inch reduced shank.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis tap is installed by machinists or maintenance tradespeople using a tap wrench, extension chuck, or machine spindle set to appropriate speed for the workpiece material. Secure the workpiece and ensure proper alignment before starting the tap to avoid thread misalignment or tap breakage. Apply a suitable cutting fluid throughout the threading operation. Follow applicable shop safety procedures and manufacturer guidelines for tap speeds and feeds when using power equipment.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\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: 8 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\u003ch4\u003eStandard Information\u003c\/h4\u003e\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: R837654\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51732499071282,"sku":"R837654","price":161.72,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/130d6036d8c7202f5890bf5e93ba5465.jpg?v=1788743632","url":"https:\/\/voomisupply.com\/products\/hertel-r837654-extension-plug-tap-1-2-13-unc-4-flute-hss","provider":"Voomi Supply","version":"1.0","type":"link"}