{"product_id":"balax-10843-010-thread-forming-sti-tap-4-40-unc-h3","title":"Balax 10843-010 Thread Forming Sti Tap 4-40 Unc H3","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe BALAX 10843-010 is a thread forming STI tap designed for producing internal threads in pre-tapped or Heli-Coil-style insert applications. It operates by cold-forming threads rather than cutting them, which eliminates chips and produces stronger thread forms in ductile materials. Built from high-speed steel with a bright, uncoated finish, this tap is suited for shops and field technicians working with small-fastener thread repair or original threading in aluminum, mild steel, and similar materials. The 4-40 UNC thread size and H3 thread limit make it appropriate for close-tolerance work in precision assemblies.\u003c\/p\u003e\n\u003cp\u003eThis tap fits into bottoming tap applications where threads must be formed to the bottom of a blind hole. The bottoming chamfer geometry allows threading close to the base of the hole with minimal runout. It is used in general machining, maintenance and repair operations, and light manufacturing where 4-40 UNC threaded inserts are specified. The BXSTI series designation confirms its STI design for use with standard thread repair insert systems. Installation is typically performed by machinists or maintenance technicians using a tap handle or machine tapping setup.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eThread forming design eliminates chips and produces stronger thread forms in ductile materials\u003c\/li\u003e\n  \u003cli\u003eBottoming chamfer allows threading to the base of blind holes\u003c\/li\u003e\n  \u003cli\u003eH3 thread limit supports close-tolerance fits in precision applications\u003c\/li\u003e\n  \u003cli\u003eHigh-speed steel construction provides durability in general-purpose tapping operations\u003c\/li\u003e\n  \u003cli\u003eBright uncoated finish suitable for use with standard tapping fluids and lubricants\u003c\/li\u003e\n  \u003cli\u003eBXSTI series design compatible with STI thread insert applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style STI tap for use in thread repair and insert applications requiring a 4-40 UNC thread form with H3 tolerance in bottoming configurations.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis tap should be installed by a qualified machinist or maintenance technician familiar with tapping procedures and proper speeds for high-speed steel tooling. Always apply an appropriate tapping fluid or cutting oil before use and ensure the tap is driven square to the workpiece to prevent breakage. Power down and secure any equipment before performing threaded insert repair on installed assemblies. Do not use this tap on hardened materials beyond the rated capability of high-speed steel tooling.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\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\u003eThread Limit\u003c\/strong\u003e: H3\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfer Type\u003c\/strong\u003e: Bottoming\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\u003eOverall Length (OAL)\u003c\/strong\u003e: 2.125 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.75 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.168 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSquare Size\u003c\/strong\u003e: 0.131 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSquare Length\u003c\/strong\u003e: 0.25 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: BXSTI\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.03 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 23241600\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: 10843-010\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"BALAX","offers":[{"title":"Default Title","offer_id":52116543602994,"sku":"10843-010","price":55.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/25e8247c1c4e7f9f02d77a0090704f81.jpg?v=1790080734","url":"https:\/\/voomisupply.com\/products\/balax-10843-010-thread-forming-sti-tap-4-40-unc-h3","provider":"Voomi Supply","version":"1.0","type":"link"}