{"product_id":"balax-10784-010-extension-thread-forming-tap-4-40-h4","title":"Balax 10784-010 Extension Thread Forming Tap 4-40 H4","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe BALAX 10784-010 is a high speed steel extension thread forming tap designed for cutting 4-40 UNC internal threads in ductile materials. Thread forming taps displace material rather than cutting it, producing stronger, cleaner threads with no chips to clear from blind holes. This tap features a bottoming chamfer for threading to the bottom of a hole, a H4 thread limit for controlled fit, and a 3-inch overall length suited for reaching recessed or deep-set hole locations. It is used by machinists, tool and die makers, and precision assembly technicians working in production or maintenance environments.\u003c\/p\u003e\u003cp\u003eThe BALAX 10784-010 is suited for applications requiring 4-40 UNC threads in materials such as aluminum, brass, mild steel, and other chip-free-forming alloys. The BXEXT series extension design provides added reach over standard-length taps, making it practical for tapping holes in deep pockets, fixtures, and assemblies where standard tap length is insufficient. The bottoming chamfer allows full thread engagement close to the bottom of blind holes, a common requirement in precision component assembly.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eThread forming design displaces material for stronger threads and eliminates chip interference in blind holes\u003c\/li\u003e\n\u003cli\u003eBottoming chamfer allows threading to the base of blind holes\u003c\/li\u003e\n\u003cli\u003eH4 thread limit provides consistent 3B class of fit for controlled tolerance threading\u003c\/li\u003e\n\u003cli\u003eExtended 3-inch overall length reaches recessed hole locations inaccessible to standard taps\u003c\/li\u003e\n\u003cli\u003eHigh speed steel construction offers durability across a 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 tapping 4-40 UNC threads with a 3B class of fit in applications requiring an extension-length bottoming tap of the BXEXT series.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThread forming taps require adequate lubrication with a suitable tapping fluid to prevent galling and tool wear. Ensure the tap is properly aligned with the pre-drilled hole before applying torque, as misalignment can damage threads or break the tap. Use a calibrated tap wrench or CNC tapping head with appropriate torque control. Power down any machine spindle and secure the workpiece firmly before beginning the tapping operation.\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: H4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClass of Fit\u003c\/strong\u003e: 3B\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: 3 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.5625 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.141 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquare Size\u003c\/strong\u003e: 0.110 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquare Length\u003c\/strong\u003e: 0.1875 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: 10784-010\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"BALAX","offers":[{"title":"Default Title","offer_id":52082252251442,"sku":"10784-010","price":93.58,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/4811b9672432d475a931a51455229ae5.jpg?v=1790056655","url":"https:\/\/voomisupply.com\/products\/balax-10784-010-extension-thread-forming-tap-4-40-h4","provider":"Voomi Supply","version":"1.0","type":"link"}