{"product_id":"emuge-bu396a00-5003-thread-forming-tap-4-40-unc-bottoming","title":"Emuge BU396A00.5003 Thread Forming Tap 4-40 Unc Bottoming","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe EMUGE BU396A00.5003 is a bottoming-style thread forming tap designed for chipless internal thread production in steel and stainless steel. Manufactured from High-Speed Steel-E-PM (powder metallurgy HSS), it carries a TiN-T26 coating for improved wear resistance and surface lubricity. The tap produces 4-40 UNC threads to a 2BX class of fit with an H3 thread limit, making it well-suited for precision blind-hole applications where dimensional consistency is critical. Overall length is 2.2047 inches with a thread length of 0.4331 inches and a maximum tapping depth of 0.7087 inches. Licensed machinists, tool and die makers, and mechanical assembly technicians are the primary installers.\u003c\/p\u003e\n\u003cp\u003eThis tap is intended for blind-hole threading operations in ferrous materials, specifically steel and stainless steel, as indicated by material application codes P and M. The bottoming chamfer with 1.5 to 2 chamfered threads allows threading close to the bottom of a blind hole, which is a common requirement in precision machined components, aerospace fastener applications, and close-tolerance mechanical assemblies. It is part of the EMUGE BU396A00 Series, marketed under the InnoForm 1-VA\/E-SN-PM-TiN-T26 trade name, and is not designed for cast iron, aluminum, or non-metallic materials.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eChipless thread forming process eliminates chip evacuation concerns in blind holes\u003c\/li\u003e\n  \u003cli\u003eHigh-Speed Steel-E-PM construction provides uniform carbide distribution and extended tool life\u003c\/li\u003e\n  \u003cli\u003eTiN-T26 coating reduces friction and improves resistance to galling on stainless steel\u003c\/li\u003e\n  \u003cli\u003eBottoming chamfer (1.5-2P) allows threading to within millimeters of hole bottom\u003c\/li\u003e\n  \u003cli\u003eH3 thread limit and 2BX class of fit ensure consistent thread gauge compliance\u003c\/li\u003e\n  \u003cli\u003eRight-hand thread direction; no coolant-through feature required for standard applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for blind-hole thread forming in steel and stainless steel workpieces. Produces 4-40 UNC internal threads to 2BX class of fit. Not rated for cast iron, aluminum, or plastics based on available material application data.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThread forming taps require a specific forming tap drill size  -  not a standard cut-tap drill  -  to achieve the correct pre-form hole diameter; consult the EMUGE forming tap drill chart for the 4-40 UNC forming drill specification. Power down and lock out all machine tools before loading or removing the tap from the holder. Use an appropriate tapping fluid rated for steel and stainless steel to reduce forming torque and extend tool life. Inspect the tap for flank wear or surface damage before each use, as forming taps operating in stainless steel are subject to galling if lubrication is insufficient.\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\u003eClass of Fit\u003c\/strong\u003e: 2BX\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H3\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfer\u003c\/strong\u003e: Bottoming\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfered Threads\u003c\/strong\u003e: 1.5 to 2P\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: High-Speed Steel-E-PM\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiN-T26\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Application\u003c\/strong\u003e: Steel, Stainless Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication\u003c\/strong\u003e: Blind Hole Threading\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.2047 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.4331 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTapping Depth\u003c\/strong\u003e: 0.7087 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\u003eFlute by Diameter Ratio\u003c\/strong\u003e: 3xD\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: BU396A00\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTrade Name\u003c\/strong\u003e: InnoForm 1-VA\/E-SN-PM-TiN-T26\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.0066 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: EMUGE\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: BU396A00.5003\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"EMUGE","offers":[{"title":"Default Title","offer_id":51986896552242,"sku":"BU396A00.5003","price":97.86,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/4c0d30181da242fbe36d5b89906b0a02_09b12eee-b238-4616-9964-28a08aab6c89.jpg?v=1789986481","url":"https:\/\/voomisupply.com\/products\/emuge-bu396a00-5003-thread-forming-tap-4-40-unc-bottoming","provider":"Voomi Supply","version":"1.0","type":"link"}