{"product_id":"osg-1400105505-thread-forming-tap-4-40-unc-cobalt-tin","title":"Osg 1400105505 Thread Forming Tap 4-40 Unc Cobalt Tin","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe OSG 1400105505 is a thread forming tap in the HY-PRO NRT series, designed for cold-forming internal threads without cutting chips. It produces a 4-40 UNC right-hand thread in blind holes, working by displacing material rather than removing it, which results in stronger thread walls and eliminates chip-clearing concerns in deep or enclosed bores. Built from cobalt high-speed steel with a titanium nitride (TiN) coating, this tap handles elevated heat and abrasion in demanding machining environments. The modified bottoming chamfer with 2 to 2.5 chamfered threads allows threading close to the bottom of a blind hole. Overall length is 1.875 inches with a shank diameter of 0.141 inches. Installed by machinists and tool-and-die tradespeople on CNC and manual equipment.\u003c\/p\u003e\n\u003cp\u003eThis tap is suited for blind hole threading applications in both production and job-shop settings. The 4-40 UNC thread size and H5 thread limit make it appropriate for small-fastener work in precision assemblies, instrument hardware, and electronic enclosures. Material application includes alloy steel, aluminum, carbon steel, die steel, hardened steel, and stainless steel, covering a wide range of workpiece materials. The TiN coating extends tool life when running higher spindle speeds or working harder alloys. Class of fit is 2B, the standard for most general-purpose UNC threaded holes.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eThread forming (chipless) design strengthens thread walls by cold-working the material\u003c\/li\u003e\n  \u003cli\u003eCobalt HSS construction resists heat buildup in difficult-to-machine alloys and stainless steel\u003c\/li\u003e\n  \u003cli\u003eTiN coating reduces friction and extends tool life at higher cutting speeds\u003c\/li\u003e\n  \u003cli\u003eModified bottoming chamfer (2 to 2.5 threads) enables threading close to the bottom of blind holes\u003c\/li\u003e\n  \u003cli\u003eH5 thread limit and 2B class of fit meet standard UNC tolerance requirements\u003c\/li\u003e\n  \u003cli\u003eRight-hand thread direction compatible with conventional tapping setups\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for blind hole threading in workpieces made from alloy steel, aluminum, carbon steel, die steel, hardened steel, and stainless steel. Produces 4-40 UNC threads to a 2B class of fit with H5 thread limit.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThread forming taps require a specific tap drill size matched to the desired thread form fill — consult a forming tap drill chart for the correct hole diameter before use, as standard cut-tap drill sizes do not apply. Power down and secure the workpiece before setup. Use a tapping fluid or cutting oil appropriate for the workpiece material, particularly with stainless steel or hardened alloys. No coolant-through capability on this tap; flood or brush lubrication should be applied externally.\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 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 2.5 threads\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\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\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\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: 0.011 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: 1400105505\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51731935953202,"sku":"1400105505","price":36.38,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/355cb34b9ee54c7a25f00adb2d2f383b.jpg?v=1788736892","url":"https:\/\/voomisupply.com\/products\/osg-1400105505-thread-forming-tap-4-40-unc-cobalt-tin","provider":"Voomi Supply","version":"1.0","type":"link"}