{"product_id":"osg-1400134500-thread-forming-tap-3-8-16-unc-bottoming","title":"Osg 1400134500 Thread Forming Tap 3\/8-16 Unc Bottoming","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 1400134500 is a 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 bright finish, it produces a 3\/8-16 UNC right-hand thread to a Class 3B fit at an H5 thread limit. The bottoming chamfer of 1 to 1.5 threads allows threading close to the bottom of a blind hole. Overall length is 2.9380 inches with a tapping depth of 1.2520 inches. Machinists and tool-room professionals install this tap in CNC machining centers, knee mills, and drill presses where chip-free threading is required.\u003c\/p\u003e\u003cp\u003eThis tap is suited for blind-hole threading applications across a range of ferrous and non-ferrous workpiece materials. Typical applications include production machining of structural components, dies, and fastener receiving holes in alloy steel, carbon steel, die steel, hardened steel, aluminum, and stainless steel. The cold-forming action displaces material rather than cutting it, producing stronger threads with improved surface finish compared to cut taps. It is appropriate for both job-shop and production environments where tight thread tolerances are required.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eThread forming action eliminates chips, reducing clogging risk in blind holes\u003c\/li\u003e\n\u003cli\u003eCobalt construction improves heat and wear resistance compared to standard HSS\u003c\/li\u003e\n\u003cli\u003eBottoming chamfer (1 to 1.5 threads) allows threading to near full depth in blind holes\u003c\/li\u003e\n\u003cli\u003eH5 thread limit holds Class 3B fit for tight-tolerance assemblies\u003c\/li\u003e\n\u003cli\u003eCompatible with alloy steel, carbon steel, die steel, hardened steel, aluminum, and stainless steel\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 blind-hole thread forming applications in alloy steel, aluminum, carbon steel, die steel, hardened steel, and stainless steel workpieces requiring a 3\/8-16 UNC Class 3B internal thread.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis tap is installed by machinists using a tap wrench, tapping head, or CNC rigid tapping cycle. Ensure the spindle speed and feed rate are set to the tap manufacturer's recommendation for the workpiece material before starting. Use an appropriate tapping fluid or cutting oil to reduce heat buildup and extend tap life. Always back the tap out fully before removing the workpiece from the fixture to avoid breakage.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 3\/8-16\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: 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: 3B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H5\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThreads per Inch\u003c\/strong\u003e: 16\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.9380 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.7520 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTapping Depth\u003c\/strong\u003e: 1.2520 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.3810 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquare Size\u003c\/strong\u003e: 0.2860 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquare Length\u003c\/strong\u003e: 0.4375 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Cobalt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Bright\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\u003eSeries\u003c\/strong\u003e: HY-PRO NRT (14001)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.086 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: 1400134500\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51732840317234,"sku":"1400134500","price":41.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/7335e97b73c8a9147e0b48aa4204bdf9.jpg?v=1788747405","url":"https:\/\/voomisupply.com\/products\/osg-1400134500-thread-forming-tap-3-8-16-unc-bottoming","provider":"Voomi Supply","version":"1.0","type":"link"}