{"product_id":"balax-12727-010-thread-forming-extension-tap-1-4-20-h7-hss","title":"Balax 12727-010 Thread Forming Extension Tap 1\/4-20 H7 Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe BALAX 12727-010 is a thread forming extension tap designed for producing strong, clean internal threads in ductile materials without cutting chips. Built from high-speed steel with a bright, uncoated finish, it carries a 1\/4-20 UNC thread specification and an H7 thread limit for precise tolerance control. The 6-inch overall length gives technicians extended reach into deep bores or recessed features that standard-length taps cannot access. This bottoming chamfer style starts threading to the bottom of a blind hole, making it the right choice when full thread depth is critical. It is used by machinists, tool and die makers, and maintenance mechanics in production and repair environments.\u003c\/p\u003e\n\u003cp\u003eThis tap suits applications in ferrous and non-ferrous ductile materials where chip-free thread forming is preferred over cutting. The bottoming chamfer makes it especially useful in blind-hole setups requiring maximum thread engagement near the base of the hole. The BXEXT series design accommodates use in CNC machining centers, drill presses, and manual tapping operations where extended reach is needed. Its right-hand flute direction and 2B class of fit align with standard UNC fastener assembly requirements common in general manufacturing, HVAC equipment fabrication, and light structural work.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eThread forming design eliminates chips, reducing tap breakage risk in ductile materials\u003c\/li\u003e\n  \u003cli\u003eBottoming chamfer allows full thread depth in blind holes\u003c\/li\u003e\n  \u003cli\u003e6-inch overall length provides extended reach into deep or recessed bores\u003c\/li\u003e\n  \u003cli\u003eH7 thread limit ensures consistent tolerance for 2B class of fit assemblies\u003c\/li\u003e\n  \u003cli\u003eHigh-speed steel construction offers durability across a range of tapping speeds\u003c\/li\u003e\n  \u003cli\u003eBright, uncoated finish suitable for use with standard cutting fluids and tapping compounds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or direct-use thread forming tap for 1\/4-20 UNC tapping applications requiring a bottoming chamfer and extended reach, fitting standard tap holders and extensions compatible with a 0.255-inch shank diameter.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThread forming taps require a specific tap drill size matched to the material for proper thread formation; consult a thread forming drill chart before use. Always apply appropriate tapping fluid or compound and ensure the workpiece is securely clamped before tapping. Disengage power and secure the machine before changing or inspecting taps. Right-hand tapping direction must be confirmed on CNC or power-tapping setups before engaging the spindle.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTap Type\u003c\/strong\u003e: Thread Forming\u003c\/li\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\u003eThreads per Inch\u003c\/strong\u003e: 20\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H7\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClass of Fit\u003c\/strong\u003e: 2B\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: 1 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.255 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSquare Size\u003c\/strong\u003e: 0.191 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSquare Length\u003c\/strong\u003e: 5\/16 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReduced Shank\u003c\/strong\u003e: No\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\u003eSeries\u003c\/strong\u003e: BXEXT\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: BALAX\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 12727-010\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"BALAX","offers":[{"title":"Default Title","offer_id":52099582886194,"sku":"12727-010","price":114.36,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/d7e4160e4f628915a073c9f42fe9009f.jpg?v=1790068369","url":"https:\/\/voomisupply.com\/products\/balax-12727-010-thread-forming-extension-tap-1-4-20-h7-hss","provider":"Voomi Supply","version":"1.0","type":"link"}