{"product_id":"osg-1625038117-thread-forming-tap-3-8-16-unc-bottoming","title":"Osg 1625038117 Thread Forming Tap 3\/8-16 Unc Bottoming","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe OSG 1625038117 is a thread forming tap in the EXOPRO XPF Series 16250, designed for cold-forming internal threads without cutting. The tap produces a 3\/8-16 UNC thread to a 2B class of fit with an H7 thread limit, using a bottoming chamfer of 1.5 to 2 threads for threading close to the bottom of a blind hole. Constructed from cobalt high speed steel with a V-coating finish, it delivers extended tool life when working in abrasive or tough materials. Overall length is 3.937 inches (100 mm) with a tapping depth of 1.575 inches (40 mm). Right-hand thread direction. Installed by machinists and toolroom mechanics in production and maintenance environments.\u003c\/p\u003e\n\u003cp\u003eThis tap is engineered for blind hole threading applications across a wide range of materials including aluminum, cast aluminum, carbon steel, alloy steel, die steel, hardened steel, stainless steel, high-nickel alloy, and titanium. The bottoming chamfer style makes it the correct choice when thread depth must extend as close as possible to the base of a drilled blind hole. It is well-suited for CNC machining centers, manual tapping machines, and rigid tapping operations where precise thread formation is required without chip generation.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eThread forming (chipless) process eliminates chip evacuation concerns in blind holes\u003c\/li\u003e\n  \u003cli\u003eCobalt high speed steel construction provides heat and wear resistance in tough alloys\u003c\/li\u003e\n  \u003cli\u003eV-coating finish reduces friction and extends tap life across varied material applications\u003c\/li\u003e\n  \u003cli\u003eBottoming chamfer (1.5 to 2 threads) allows threading to near full depth in blind holes\u003c\/li\u003e\n  \u003cli\u003eH7 thread limit ensures consistent 2B class of fit on finished threads\u003c\/li\u003e\n  \u003cli\u003eCompatible material codes P, M, N, and H cover steels, stainless, high-nickel alloys, and non-ferrous metals\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eSuitable for use in aluminum, cast aluminum, hardened steel, carbon steel, alloy steel, die steel, stainless steel, high-nickel alloy, and titanium workpieces requiring 3\/8-16 UNC blind hole 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 OSG EXOPRO XPF recommended forming drill chart before drilling. Always power down or de-energize the machine and secure the workpiece before tool changes. Use a cutting fluid or tapping compound appropriate for the workpiece material, particularly when tapping stainless steel or titanium. Verify spindle speed and feed rate are set to the tap manufacturer's recommendations before beginning the tapping cycle.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\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\u003eClass of Fit\u003c\/strong\u003e: 2B\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H7\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfer Type\u003c\/strong\u003e: Bottoming\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfered Threads\u003c\/strong\u003e: 1.5 to 2P\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThreads per Inch\u003c\/strong\u003e: 16\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.625 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3.937 inches (100 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTapping Depth\u003c\/strong\u003e: 1.575 inches (40 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.381 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSquare Size\u003c\/strong\u003e: 0.286 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 High Speed Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: V-Coating\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: 16250 (EXOPRO XPF)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.105 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: 1625038117\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51727237218610,"sku":"1625038117","price":170.58,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/97a1414e31a570fbb064964d71eb3551_f6e94de8-11e9-4bf9-9135-ac2eaa1f0640.jpg?v=1788675176","url":"https:\/\/voomisupply.com\/products\/osg-1625038117-thread-forming-tap-3-8-16-unc-bottoming","provider":"Voomi Supply","version":"1.0","type":"link"}