{"product_id":"osg-2936801-spiral-flute-tap-3-8-24-unf-vanadium-hss","title":"Osg 2936801 Spiral Flute Tap 3\/8-24 Unf Vanadium Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe OSG 2936801 is a spiral flute tap designed to cut 3\/8-24 UNF internal threads in a range of ferrous metals. Built from vanadium high-speed steel with a steam oxide coating, it operates as a modified bottoming tap, meaning the chamfer is shortened to allow threading closer to the bottom of a blind hole. The 45-degree helix angle evacuates chips upward out of the hole, making it well-suited for blind-hole applications where chip packing is a common failure point. The tap is ground to an H4 thread limit and a 2B class of fit, which is the standard commercial tolerance for general fastener threads. Overall length is 2.938 inches.\u003c\/p\u003e\n\u003cp\u003eThis tap is used in machine shop, maintenance, and production environments where 3\/8-24 UNF threads are required in blind holes. Material applications include alloy steel, carbon steel, cast iron, stainless steel, die steel, and hardened steel. The modified bottoming chamfer makes it the right choice when a standard taper or plug tap cannot reach thread depth. It is used in CNC tapping, turret lathes, drill presses with tapping attachments, and hand tapping operations where the operator needs control close to the bottom of the hole.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e45-degree right-hand spiral flute evacuates chips upward, reducing packing in blind holes\u003c\/li\u003e\n  \u003cli\u003eModified bottoming chamfer threads closer to hole bottom than plug or taper styles\u003c\/li\u003e\n  \u003cli\u003eVanadium high-speed steel construction provides hardness and wear resistance in ferrous materials\u003c\/li\u003e\n  \u003cli\u003eSteam oxide coating reduces friction and provides light corrosion resistance during storage and use\u003c\/li\u003e\n  \u003cli\u003eH4 thread limit ground to 2B class of fit for standard commercial thread tolerance\u003c\/li\u003e\n  \u003cli\u003e3 flutes with right-hand thread direction; no coolant-through feature\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for cutting 3\/8-24 UNF 2B class threads in alloy steel, carbon steel, cast iron, stainless steel, die steel, and hardened steel workpieces. Part of OSG Series 290.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis tap is installed by machinists and tool and die professionals using a tap wrench, tapping head, or CNC rigid tapping cycle. Before use, ensure the pilot hole is drilled to the correct tap drill diameter for 3\/8-24 UNF to achieve proper thread engagement. Use an appropriate cutting fluid for the workpiece material, particularly when tapping stainless or alloy steel. Do not exceed the recommended speed for the material and tap size, and never reverse a spiral flute tap under power without confirming the tapping attachment supports it.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 3\/8-24\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNF\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: H4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 3\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Style\u003c\/strong\u003e: Spiral\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHelix Angle\u003c\/strong\u003e: 45 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfer\u003c\/strong\u003e: Modified Bottoming\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThreads per Inch\u003c\/strong\u003e: 24\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.938 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNeck Length\u003c\/strong\u003e: 1.251 inches\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 Length\u003c\/strong\u003e: 0.4375 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\u003eMaterial\u003c\/strong\u003e: Vanadium High-Speed Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: Steam Oxide\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: 290\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.073 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: 2936801\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51728195977522,"sku":"2936801","price":59.38,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/05ce6c01c59e0fba6b197f4b0eb301ba.jpg?v=1788689343","url":"https:\/\/voomisupply.com\/products\/osg-2936801-spiral-flute-tap-3-8-24-unf-vanadium-hss","provider":"Voomi Supply","version":"1.0","type":"link"}