{"product_id":"balax-10803-010-extension-thread-forming-tap-4-40-h3","title":"Balax 10803-010 Extension Thread Forming Tap 4-40 H3","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe BALAX 10803-010 is a 4-40 UNC extension thread forming tap designed for producing internal threads without cutting flutes. Instead of removing material, it displaces and cold-forms metal to create strong, burr-free threads. Built from high-speed steel with a bright, uncoated finish, it measures 4 inches overall length with a 9\/16-inch thread length. The bottoming chamfer allows threading close to the bottom of blind holes. At a 0.1410-inch shank diameter and H3 thread limit, this tap delivers consistent dimensional accuracy for close-tolerance applications. It is installed by machinists and maintenance technicians working with ductile metals in production or repair environments.\u003c\/p\u003e\u003cp\u003eThis extension tap is suited for applications where standard-length taps cannot reach recessed or deep-set hole locations. The extended overall length provides the reach needed in fixtures, castings, or assemblies where a standard tap would fall short. The 4-40 thread size targets small fastener applications common in light mechanical assemblies, electrical enclosures, and precision hardware. The 2B class of fit meets standard tolerance requirements for most general-purpose threaded fastener applications. Right-hand flute direction follows conventional threading operations.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eThread forming design cold-forms metal for stronger, burr-free threads without chip generation\u003c\/li\u003e\n\u003cli\u003eBottoming chamfer allows threading to the base of blind holes\u003c\/li\u003e\n\u003cli\u003eH3 thread limit provides controlled oversize tolerance for consistent 2B class of fit\u003c\/li\u003e\n\u003cli\u003e4-inch overall length extends reach into deep or recessed hole locations\u003c\/li\u003e\n\u003cli\u003eHigh-speed steel construction handles a wide range of ductile workpiece materials\u003c\/li\u003e\n\u003cli\u003eBright, uncoated finish suitable for use with standard tapping fluids\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in 4-40 UNC threaded applications requiring an extension tap with a bottoming chamfer and 2B class of fit, typically in ductile metals compatible with thread forming operations.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThread forming taps require proper lubrication with a tapping fluid suited to the workpiece material  -  do not run dry. Ensure the tap is correctly aligned to the hole axis before applying torque to prevent tap breakage. Power down and secure any machine tool before changing or installing tooling. Consult applicable shop standards and the workpiece material specifications to confirm thread forming suitability before use.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\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: 4-40\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: 40\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\u003eChamfer\u003c\/strong\u003e: Bottoming\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 9\/16 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.1410 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquare Size\u003c\/strong\u003e: 0.1100 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquare Length\u003c\/strong\u003e: 3\/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: 0.5 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 23241600\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\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: 10803-010\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"BALAX","offers":[{"title":"Default Title","offer_id":52016123609394,"sku":"10803-010","price":109.54,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/65bd0fca7535a8411e97caebe71026a0.jpg?v=1790008370","url":"https:\/\/voomisupply.com\/products\/balax-10803-010-extension-thread-forming-tap-4-40-h3","provider":"Voomi Supply","version":"1.0","type":"link"}