{"product_id":"osg-2907801-spiral-flute-tap-8-32-unc-modified-bottoming","title":"Osg 2907801 Spiral Flute Tap 8-32 Unc Modified Bottoming","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe OSG 2907801 is a spiral flute tap designed to cut 8-32 UNC internal threads in a wide range of ferrous materials. Built from vanadium high-speed steel (HSS) with a steam oxide finish, it delivers reliable wear resistance and chip evacuation in through-hole and shallow blind-hole applications. The 45-degree right-hand helix drives chips up and out of the hole, reducing the risk of chip packing. With a modified bottoming chamfer, this tap threads close to the bottom of a blind hole while still tolerating minor misalignment during entry. It is sized for use in hand tapping, drill press, or CNC tapping operations on standard 3B-class-of-fit threaded assemblies.\u003c\/p\u003e\n\u003cp\u003eThis tap is suited for production and maintenance threading work in alloy steel, carbon steel, cast iron, stainless steel, die steel, and hardened steel. The 8-32 UNC thread form is common in instrumentation panels, electrical enclosures, machine housings, and light structural assemblies. Machinists, tool and die makers, and maintenance mechanics will find the modified bottoming chamfer useful where thread engagement must begin close to a blind-hole floor without requiring a true bottoming tap pass first.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e45-degree right-hand spiral flute evacuates chips efficiently in blind-hole applications\u003c\/li\u003e\n  \u003cli\u003eModified bottoming chamfer allows threading close to hole bottom with reduced tap starts\u003c\/li\u003e\n  \u003cli\u003eVanadium high-speed steel construction provides elevated heat and wear resistance\u003c\/li\u003e\n  \u003cli\u003eSteam oxide coating reduces friction and provides light corrosion resistance during storage\u003c\/li\u003e\n  \u003cli\u003eH2 thread limit holds tight tolerance for 3B class of fit requirements\u003c\/li\u003e\n  \u003cli\u003eThree flutes balance chip load and tool rigidity in the 8-32 size range\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for cutting 8-32 UNC threads with a 3B class of fit in alloy steel, carbon steel, cast iron, stainless steel, die steel, and hardened steel workpieces.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eA licensed machinist or qualified maintenance mechanic should select a drill bit sized to the correct 8-32 tap drill diameter before use. Ensure the workpiece is securely fixtured and the tap is aligned perpendicular to the drilled hole to prevent tap breakage. Apply a compatible cutting fluid or tapping compound appropriate for the workpiece material, particularly when threading stainless steel or hardened steel. Do not exceed the torque limits of the tap for this size class; back off periodically to break and clear chips when tapping by hand.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 8-32\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: 3B\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H2\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: 32\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.125 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.251 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNeck Length\u003c\/strong\u003e: 0.751 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.168 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSquare Size\u003c\/strong\u003e: 0.131 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSquare Length\u003c\/strong\u003e: 0.25 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: 0.015 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: 2907801\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51747408150834,"sku":"2907801","price":44.14,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/2de45fcab690bc11bc08e36ff085b98d.jpg?v=1788879648","url":"https:\/\/voomisupply.com\/products\/osg-2907801-spiral-flute-tap-8-32-unc-modified-bottoming","provider":"Voomi Supply","version":"1.0","type":"link"}