{"product_id":"osg-1400105305-thread-forming-tap-4-40-unc-cobalt-tin","title":"Osg 1400105305 Thread Forming Tap 4-40 Unc Cobalt Tin","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 1400105305 is a thread forming tap in the HY-PRO NRT series, designed for cold-forming 4-40 UNC internal threads without cutting or producing chips. Built from cobalt high-speed steel and finished with a titanium nitride (TiN) coating, this tap handles demanding threading applications where tool life and surface finish matter. The modified bottoming chamfer with 2 to 2.5 chamfered threads allows threading close to the bottom of blind holes. Overall length is 1.875 inches with a tapping depth of 0.559 inches. Shank diameter is 0.141 inches. Right-hand thread direction. Class of fit is 3B with a thread limit of H3. Typically installed by machinists, toolmakers, and maintenance technicians working in precision fabrication environments.\u003c\/p\u003e\u003cp\u003eThis tap is suited for blind hole threading operations in a range of metallic workpiece materials. It is rated for use in alloy steel, aluminum, carbon steel, die steel, hardened steel, and stainless steel, making it a versatile choice for general machining, toolroom work, and production threading in small-diameter 4-40 UNC applications. The thread forming process displaces material rather than cutting it, which produces stronger threads and eliminates chip-breaking concerns in blind holes.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eThread forming design displaces material rather than cutting, producing chip-free blind hole threads\u003c\/li\u003e\n\u003cli\u003eCobalt high-speed steel construction provides heat and wear resistance in tough alloys and hardened steels\u003c\/li\u003e\n\u003cli\u003eTiN coating reduces friction and extends tool life across a broad range of workpiece materials\u003c\/li\u003e\n\u003cli\u003eModified bottoming chamfer (2 to 2.5 threads) allows threading close to blind hole bottoms\u003c\/li\u003e\n\u003cli\u003eH3 thread limit and 3B class of fit for consistent, accurate thread production\u003c\/li\u003e\n\u003cli\u003eRight-hand, 40 threads per inch, 4-40 UNC specification\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for blind hole threading in alloy steel, aluminum, carbon steel, die steel, hardened steel, and stainless steel workpieces requiring 4-40 UNC internal threads. Material application codes P and N apply.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThread forming taps require a properly sized form tap drill hole, which differs from a standard cut tap drill size — consult a thread forming drill chart for the correct hole diameter before tapping. Use a tapping fluid or cutting oil appropriate for the workpiece material to reduce friction and extend tap life. Secure the workpiece and use a calibrated torque-limiting tap handle or tapping attachment to avoid over-torquing this small-diameter tap. Follow shop safety procedures and ensure the spindle or driver is aligned axially with the hole before engaging the tap.\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\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\u003eClass of Fit\u003c\/strong\u003e: 3B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H3\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\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 (14001)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.01 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: 1400105305\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51731686883634,"sku":"1400105305","price":39.32,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/83fbdcd78a6aa5d64778501082545a4e.jpg?v=1788733897","url":"https:\/\/voomisupply.com\/products\/osg-1400105305-thread-forming-tap-4-40-unc-cobalt-tin","provider":"Voomi Supply","version":"1.0","type":"link"}