{"product_id":"osg-1400105205-thread-forming-tap-4-40-unc-cobalt-tin","title":"Osg 1400105205 Thread Forming Tap 4-40 Unc Cobalt Tin","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 1400105205 is a thread forming tap in the HY-PRO NRT series, designed for cold-forming internal threads without cutting chips. It produces 4-40 UNC right-hand threads in blind hole applications using a modified bottoming chamfer with 2 to 2.5 chamfered threads. Manufactured from cobalt high-speed steel and coated with titanium nitride (TiN), it is built for extended tool life in demanding threading operations. The H2 thread limit provides consistent dimensional control. With an overall length of 1.875 inches and a tapping depth of 0.559 inches, it fits standard tap holders for small-fastener work in machining and fabrication environments.\u003c\/p\u003e\u003cp\u003eThis tap is suited for threading blind holes in a broad range of metallic workpiece materials including alloy steel, aluminum, carbon steel, die steel, hardened steel, and stainless steel. The thread forming method displaces material rather than cutting it, resulting in stronger threads with no chip evacuation concerns. It is commonly used in precision machining, toolroom work, CNC tapping operations, and general metalworking where 4-40 UNC fastener holes are required at tight tolerances.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eThread forming (chipless) design eliminates chip packing in blind holes\u003c\/li\u003e\n\u003cli\u003eCobalt HSS construction for heat and wear resistance in tough alloys\u003c\/li\u003e\n\u003cli\u003eTiN coating reduces friction and extends tool life across multiple materials\u003c\/li\u003e\n\u003cli\u003eModified bottoming chamfer (2 to 2.5P) allows threading close to the bottom of blind holes\u003c\/li\u003e\n\u003cli\u003eH2 thread limit for consistent, close-tolerance thread production\u003c\/li\u003e\n\u003cli\u003eRight-hand thread direction, compatible with standard tap drivers and CNC toolholders\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in blind hole threading of 4-40 UNC threads in alloy steel, aluminum, carbon steel, die steel, hardened steel, and stainless steel workpieces. Material application codes P and N apply.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis tap should be installed by a machinist or toolroom technician familiar with thread forming operations. Ensure the correct pilot hole diameter for thread forming is used, as it differs from a cut-tap pilot hole. Secure the workpiece and use a tap holder with appropriate torque control to avoid tap breakage in small diameters. Apply cutting fluid or tapping compound appropriate for the workpiece material before and during the tapping operation.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\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\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H2\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: Cobalt High-Speed Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiN (Titanium Nitride)\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: 0.295 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: 0.110 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\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: HY-PRO NRT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.012 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\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: 1400105205\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51730178408754,"sku":"1400105205","price":39.43,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/0ac8dc7aae5964332e05f4eb8dd55749.jpg?v=1788713038","url":"https:\/\/voomisupply.com\/products\/osg-1400105205-thread-forming-tap-4-40-unc-cobalt-tin","provider":"Voomi Supply","version":"1.0","type":"link"}