{"product_id":"osg-2941108-spiral-flute-tap-5-16-18-unc-ticn-vanadium-hss","title":"Osg 2941108 Spiral Flute Tap 5\/16-18 Unc Ticn Vanadium Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe OSG 2941108 is a spiral flute tap designed for cutting 5\/16-18 UNC right-hand internal threads in a wide range of ferrous materials. Built from vanadium high-speed steel and finished with a titanium carbonitride (TiCN) coating, this tap delivers increased surface hardness and lubricity compared to uncoated HSS tools. The modified bottoming chamfer allows threading closer to the bottom of a blind hole than a standard plug or taper tap. With a 45-degree helix angle, the flute geometry pulls chips up and out of the hole during the cut, reducing the risk of chip packing in blind-hole applications. Overall length is 2-23\/32 inches and the shank diameter is 0.318 inches, fitting standard tap holders for this size range.\u003c\/p\u003e\n\u003cp\u003eThe OSG 2941108 is suited for production and maintenance threading operations in alloy steel, carbon steel, cast iron, stainless steel, die steel, and hardened steel. The TiCN coating makes it a practical choice when working with abrasive or tougher work materials where uncoated tools wear prematurely. Thread limit is H11, which is an oversize designation appropriate for applications requiring plated fasteners or close-tolerance fits after coating. It is used in machine-shop, tool-and-die, and industrial maintenance settings wherever 5\/16-18 UNC blind holes need to be threaded efficiently.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e5\/16-18 UNC thread form, right-hand spiral flute, 3 flutes\u003c\/li\u003e\n  \u003cli\u003eTiCN coating improves wear resistance and reduces friction on difficult materials\u003c\/li\u003e\n  \u003cli\u003eModified bottoming chamfer for threading close to the bottom of blind holes\u003c\/li\u003e\n  \u003cli\u003e45-degree helix angle evacuates chips upward out of the cut zone\u003c\/li\u003e\n  \u003cli\u003eH11 oversize thread limit  -  suitable for applications where fasteners will be plated or coated\u003c\/li\u003e\n  \u003cli\u003eVanadium high-speed steel substrate for toughness in interrupted cuts and hard materials\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eCompatible with alloy steel, carbon steel, cast iron, stainless steel, die steel, and hardened steel workpieces. Designed for use in standard tap holders and machine spindles accepting a 0.318-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\u003eThis tap is intended for use by machinists and tooling professionals operating drill presses, CNC machining centers, or manual tapping equipment. Ensure the workpiece is securely fixtured and the correct tap drill size for 5\/16-18 UNC is used before threading. Apply cutting fluid appropriate for the workpiece material to extend tool life and protect the TiCN coating. Inspect the tap for wear or damage before each use; a chipped or worn tap in hardened material can break and become difficult to remove.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 5\/16-18\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: 18\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\u003eFlute Direction\u003c\/strong\u003e: Right Hand\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\u003eThread Limit\u003c\/strong\u003e: H11\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOversize\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2-23\/32 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.444 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.318 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSquare Length\u003c\/strong\u003e: 0.375 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSquare Size\u003c\/strong\u003e: 0.238 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: 0.048 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: 2941108\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51742896062770,"sku":"2941108","price":66.76,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/02ab667616efb4d987ba47b34c328acb_2b485aa3-f12c-412d-8dcf-bda0476c0050.jpg?v=1788840360","url":"https:\/\/voomisupply.com\/products\/osg-2941108-spiral-flute-tap-5-16-18-unc-ticn-vanadium-hss","provider":"Voomi Supply","version":"1.0","type":"link"}