{"product_id":"osg-1400105105-thread-forming-tap-4-40-unc-bottoming-tin","title":"Osg 1400105105 Thread Forming Tap 4-40 Unc Bottoming Tin","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe OSG 1400105105 is a thread forming tap designed for 4-40 UNC blind hole threading applications. Unlike cutting taps, thread forming taps cold-form the thread profile without producing chips, reducing the risk of chip packing in blind holes. Built from cobalt high-speed steel and finished with a titanium nitride (TiN) coating, this tap handles demanding materials including alloy steel, stainless steel, hardened steel, carbon steel, die steel, and aluminum. The bottoming chamfer with 1 to 1.5 chamfered threads allows threading close to the bottom of a blind hole. It carries an H5 thread limit and produces a Class 2B fit, standard for general-purpose fastener applications.\u003c\/p\u003e\n\u003cp\u003eThis tap is suited for machine shop, maintenance, and production threading in both light and heavy manufacturing environments. Its 4-40 UNC thread size targets small fastener work common in instrumentation, electronics enclosures, and precision assemblies. The right-hand thread direction is compatible with standard tapping heads and CNC tapping cycles. The HY-PRO NRT series designation identifies it within the OSG product line as a form tap optimized for ductile and semi-ductile workpiece materials where chip-free threading is an advantage.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eThread forming (chipless) design eliminates chip evacuation concerns in blind holes\u003c\/li\u003e\n  \u003cli\u003eCobalt high-speed steel construction for heat and wear resistance in tough alloys\u003c\/li\u003e\n  \u003cli\u003eTiN coating reduces friction and extends tool life across a wide range of workpiece materials\u003c\/li\u003e\n  \u003cli\u003eBottoming chamfer (1 to 1.5 threads) maximizes usable thread depth in blind holes\u003c\/li\u003e\n  \u003cli\u003eH5 thread limit with Class 2B fit for standard general-purpose threading tolerances\u003c\/li\u003e\n  \u003cli\u003eNo coolant-through requirement simplifies machine setup\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in alloy steel, aluminum, carbon steel, die steel, hardened steel, and stainless steel workpieces. Intended for 4-40 UNC blind hole applications where chipless thread forming is required.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThread forming taps require a properly sized forming tap drill hole, which differs from a standard cut tap drill size — consult the OSG HY-PRO NRT series drill chart for the correct pre-drill diameter for 4-40 UNC. Install using a tapping head, CNC rigid tapping cycle, or manual tap wrench rated for the shank size. Ensure the workpiece is securely fixtured before tapping to prevent tap breakage in small-diameter applications. Apply appropriate tapping fluid or cutting oil for the workpiece material to reduce forming torque and extend tap life.\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\u003eChamfer Type\u003c\/strong\u003e: Bottoming\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfered Threads\u003c\/strong\u003e: 1 to 1.5P\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\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\u003eApplication\u003c\/strong\u003e: Blind Hole Threading\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Application\u003c\/strong\u003e: Alloy Steel, Aluminum, Carbon Steel, Die Steel, Hardened Steel, Stainless Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: HY-PRO NRT (14001)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.011 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: 1400105105\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51732476887346,"sku":"1400105105","price":36.38,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/90acd1d9395dcaa4835e3336af5b93ce.jpg?v=1788743330","url":"https:\/\/voomisupply.com\/products\/osg-1400105105-thread-forming-tap-4-40-unc-bottoming-tin","provider":"Voomi Supply","version":"1.0","type":"link"}