{"product_id":"osg-1400125605-thread-forming-tap-1-4-20-unc-bottoming-cobalt","title":"Osg 1400125605 Thread Forming Tap 1\/4-20 Unc Bottoming Cobalt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe OSG 1400125605 is a bottoming-style thread forming tap in the HY-PRO NRT series, designed for cold-forming internal threads in blind holes without cutting chips. Built from cobalt high-speed steel with a titanium nitride (TiN) coating, this tap displaces material rather than removing it, producing stronger threads with improved surface finish. The 1\/4-20 UNC configuration covers a widely used fastener size across general fabrication and mechanical assembly. With an overall length of 2.5 inches and a thread length of 0.594 inches, it fits standard tap holders and machine spindles used in production and maintenance environments. The H5 thread limit suits close-tolerance work.\u003c\/p\u003e\n\u003cp\u003eThis tap is suited for threading blind holes in alloy steel, carbon steel, aluminum, die steel, hardened steel, and stainless steel. The bottoming chamfer with 1 to 1.5 chamfered threads allows threading close to the bottom of a hole, making it the correct choice when full thread depth is required in short, closed-end bores. It is commonly used in machine shops, manufacturing plants, and maintenance facilities where a right-hand, 1\/4-20 UNC internal thread is needed in production or repair operations.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eBottoming chamfer (1-1.5P) for threading to the bottom of blind holes\u003c\/li\u003e\n  \u003cli\u003eCobalt HSS construction for improved 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\u003eThread forming (chipless) design eliminates chip evacuation concerns in blind holes\u003c\/li\u003e\n  \u003cli\u003eH5 thread limit for close-tolerance 1\/4-20 UNC threads\u003c\/li\u003e\n  \u003cli\u003eRight-hand thread direction compatible with standard tapping equipment\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 requiring blind hole threading. Compatible with standard 1\/4-inch tap holders and CNC or manual tapping equipment configured for 1\/4-20 UNC right-hand threads.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThread forming taps require a larger pilot hole diameter than cutting taps — consult the appropriate forming tap drill chart for the correct hole size before tapping. Use cutting or tapping fluid appropriate for the workpiece material to reduce heat and extend tap life. Ensure the tap is properly aligned with the hole axis before engagement to avoid bell-mouthing or thread distortion. Machine spindle speed should be set per the tap manufacturer recommendations for the specific workpiece material.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/4-20 UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfer\u003c\/strong\u003e: Bottoming\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfered Threads\u003c\/strong\u003e: 1-1.5P\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThreads per Inch\u003c\/strong\u003e: 20\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: H5\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\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiN\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\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\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\u003eTapping Depth\u003c\/strong\u003e: 0.933 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: 0.033 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: 1400125605\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51730394120498,"sku":"1400125605","price":38.51,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/997578475b1745b03115f92d13c89895.jpg?v=1788716657","url":"https:\/\/voomisupply.com\/products\/osg-1400125605-thread-forming-tap-1-4-20-unc-bottoming-cobalt","provider":"Voomi Supply","version":"1.0","type":"link"}