{"product_id":"osg-1400126805-thread-forming-tap-1-4-20-unc-cobalt-tin","title":"Osg 1400126805 Thread Forming Tap 1\/4-20 Unc Cobalt Tin","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 1400126805 is a thread forming tap in the HY-PRO NRT series, designed for cold-forming internal threads in blind holes without cutting chips. Sized for 1\/4-20 UNC threads, this tap is manufactured from cobalt high-speed steel and finished with a TiN (titanium nitride) coating to extend tool life in abrasive and hard materials. The modified bottoming chamfer, with 2 to 2.5 chamfered threads, allows threading close to the bottom of a blind hole. Overall length is 2.5 inches with a thread length of 0.594 inches and a tapping depth of 0.933 inches. Right-hand thread direction. Thread limit is H10. Installed by machinists, tool and die technicians, and maintenance trades.\u003c\/p\u003e\u003cp\u003eThis tap is suited for blind hole threading operations in alloy steel, carbon steel, die steel, hardened steel, stainless steel, and aluminum. The cold-forming action displaces material rather than cutting it, producing stronger threads with a burnished surface finish. Typical applications include production tapping on CNC machining centers, manual drill press setups, and hand tapping in maintenance and repair environments where chip evacuation in blind holes is a concern.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCold-forming design eliminates chips — ideal for blind hole applications\u003c\/li\u003e\n\u003cli\u003eModified bottoming chamfer (2 to 2.5P) threads close to hole bottom\u003c\/li\u003e\n\u003cli\u003eCobalt HSS construction for performance in hardened and stainless steels\u003c\/li\u003e\n\u003cli\u003eTiN coating improves wear resistance and reduces galling\u003c\/li\u003e\n\u003cli\u003eH10 thread limit for controlled fit in high-tolerance applications\u003c\/li\u003e\n\u003cli\u003eRight-hand thread direction, no coolant-through requirement\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for 1\/4-20 UNC blind hole threading in alloy steel, aluminum, carbon steel, die steel, hardened steel, and stainless steel. Material application codes P and N. Part of the OSG HY-PRO NRT series (Series 14001).\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThread forming taps require a specific forming tap drill size — do not use standard cut tap drill charts, as forming taps need a slightly larger hole to allow material displacement. Apply appropriate tapping fluid for the workpiece material before tapping; this is especially important with stainless and hardened steels. Secure the workpiece and ensure the tap is driven perpendicular to the hole axis to avoid thread distortion or tap breakage. Follow shop-specific speeds and feeds for the material being tapped.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/4-20\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChamfer Type\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\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H10\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThreads per Inch\u003c\/strong\u003e: 20\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: 2.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.594 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTapping Depth\u003c\/strong\u003e: 0.933 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.255 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquare Size\u003c\/strong\u003e: 0.191 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquare Length\u003c\/strong\u003e: 0.3125 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 Applications\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 (Series 14001)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.033 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: 1400126805\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51731872284978,"sku":"1400126805","price":38.51,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/d36112271e560be20da7335374d92ced.jpg?v=1788735898","url":"https:\/\/voomisupply.com\/products\/osg-1400126805-thread-forming-tap-1-4-20-unc-cobalt-tin","provider":"Voomi Supply","version":"1.0","type":"link"}