{"product_id":"osg-1405002508-thread-forming-tap-4-40-unc-modified-bottoming","title":"Osg 1405002508 Thread Forming Tap 4-40 Unc Modified Bottoming","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe OSG 1405002508 is a thread forming tap in the EXOTAP VP-NRT series, designed to cut 4-40 UNC internal threads using a cold-forming process rather than cutting chips. Manufactured from powdered metal high-speed steel and finished with a TiCN coating, it delivers extended tool life in demanding production and maintenance tapping applications. The modified bottoming chamfer with 2 to 2.5 chamfered threads allows threading close to the bottom of blind holes. The H5 thread limit produces a Class 2B fit, meeting standard tolerance requirements for 4-40 fastener assemblies. Machinists and tool room technicians install this tap in CNC machining centers, drill presses, and manual tapping fixtures.\u003c\/p\u003e\n\u003cp\u003eThis tap is rated for blind hole threading in a broad range of metallic workpiece materials, including alloy steel, aluminum, carbon steel, die steel, hardened steel, and stainless steel. The EXOTAP VP-NRT design is suited for high-volume production environments where chip evacuation is a concern, since the forming process eliminates chips entirely. It is a right-hand tap compatible with standard 4-40 UNC tapping sequences in both production and maintenance settings.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e4-40 UNC thread form with right-hand direction and Class 2B fit at H5 thread limit\u003c\/li\u003e\n  \u003cli\u003eModified bottoming chamfer with 2 to 2.5 chamfered threads for threading near the bottom of blind holes\u003c\/li\u003e\n  \u003cli\u003ePowdered metal high-speed steel construction for uniform grain structure and extended tool life\u003c\/li\u003e\n  \u003cli\u003eTiCN coating reduces friction and improves wear resistance across diverse workpiece materials\u003c\/li\u003e\n  \u003cli\u003eChipless cold-forming process eliminates chip evacuation issues in blind hole applications\u003c\/li\u003e\n  \u003cli\u003eRated for alloy steel, aluminum, carbon steel, die steel, hardened steel, and stainless steel\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for blind hole threading in 4-40 UNC applications across alloy steel, aluminum, carbon steel, die steel, hardened steel, and stainless steel workpieces. Material application codes P, M, and N are supported per the manufacturer specification.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstall and operate this tap in accordance with the machine tool manufacturer guidelines and applicable shop safety procedures. Power down or de-energize tapping equipment before mounting or removing the tap from the holder. Use appropriate tapping fluid or cutting oil matched to the workpiece material to maintain coating integrity and thread quality. Verify spindle speed and feed rate settings against published recommendations for the workpiece material before beginning the tapping cycle.\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\u003eThreads per Inch\u003c\/strong\u003e: 40\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClass of Fit\u003c\/strong\u003e: 2B\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H5\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfer\u003c\/strong\u003e: Modified Bottoming\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfered Threads\u003c\/strong\u003e: 2 to 2.5P\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication\u003c\/strong\u003e: Blind Hole Threading\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Powdered Metal High-Speed Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiCN\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 1.875 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.2953 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTapping Depth\u003c\/strong\u003e: 0.559 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: 0.11 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\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: EXOTAP VP-NRT\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.01 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: OSG\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 1405002508\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51727700754738,"sku":"1405002508","price":67.87,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/3ae4f29edbef15398b2475c54ae3d22f.jpg?v=1788681023","url":"https:\/\/voomisupply.com\/products\/osg-1405002508-thread-forming-tap-4-40-unc-modified-bottoming","provider":"Voomi Supply","version":"1.0","type":"link"}