{"product_id":"osg-2916508-spiral-flute-tap-4-40-unc-ticn-vanadium-hss","title":"Osg 2916508 Spiral Flute Tap 4-40 Unc Ticn Vanadium Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe OSG 2916508 is a spiral flute tap designed for cutting internal 4-40 UNC right-hand threads in a wide range of metallic workpiece materials. Manufactured from vanadium high-speed steel and finished with a titanium carbonitride (TiCN) coating, this tap delivers improved wear resistance and surface hardness compared to uncoated HSS alternatives. The modified bottoming chamfer allows threading closer to the bottom of blind holes while still providing controlled chip evacuation through the 45-degree right-hand spiral flutes. With a thread limit of H4, it holds tight tolerances appropriate for precision fastener applications. Machinists and toolroom technicians working in job shop, production, or MRO environments will find this tap well-suited for close-tolerance threading work.\u003c\/p\u003e\n\u003cp\u003eThe OSG 2916508 is intended for threading operations in alloy steel, carbon steel, cast iron, stainless steel, die steel, and hardened steel. The spiral flute geometry promotes upward chip evacuation, making it particularly effective in blind-hole applications where chip packing is a concern. At 1-7\/8 inches overall length with a 0.367-inch shank diameter, this tap fits standard tap holders and chucks used in CNC machining centers, drill presses, and manual tapping setups. It is sold individually with a minimum order quantity of one.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e4-40 UNC thread form, right-hand direction, H4 thread limit for precision tolerance control\u003c\/li\u003e\n  \u003cli\u003eVanadium high-speed steel construction for enhanced toughness and tool life\u003c\/li\u003e\n  \u003cli\u003eTiCN coating increases surface hardness and reduces friction against the workpiece\u003c\/li\u003e\n  \u003cli\u003e45-degree right-hand spiral flutes evacuate chips upward out of blind holes\u003c\/li\u003e\n  \u003cli\u003eModified bottoming chamfer allows threading near the base of blind holes\u003c\/li\u003e\n  \u003cli\u003eCompatible with alloy steel, carbon steel, cast iron, stainless steel, die steel, and hardened steel\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eRated for use in alloy steel, carbon steel, cast iron, stainless steel, die steel, and hardened steel workpieces. Fits standard tap holders and collet chucks accepting a 0.367-inch shank diameter. Part of the OSG Series 290 spiral flute tap line.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation and use should be performed by a qualified machinist or toolroom technician. Secure the workpiece and ensure the spindle is properly aligned before beginning the tapping operation. Use appropriate cutting fluid for the workpiece material to extend tool life and maintain thread quality. Always bring the machine to a complete stop before inspecting the tap or clearing chips from the flutes.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\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\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThreads per Inch\u003c\/strong\u003e: 40\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 Direction\u003c\/strong\u003e: Right Hand\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\u003eMaterial\u003c\/strong\u003e: Vanadium High-Speed Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiCN\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 1.875 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length (Decimal)\u003c\/strong\u003e: 3.375 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.196 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNeck Length\u003c\/strong\u003e: 1.933 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.367 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\u003eSquare Size\u003c\/strong\u003e: 0.11 inches\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: 0.01 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: 2916508\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51740371714354,"sku":"2916508","price":59.41,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/643c267b1b0837016fcb272bad0532ff.jpg?v=1788824582","url":"https:\/\/voomisupply.com\/products\/osg-2916508-spiral-flute-tap-4-40-unc-ticn-vanadium-hss","provider":"Voomi Supply","version":"1.0","type":"link"}