{"product_id":"osg-2941001-spiral-flute-tap-5-16-18-unc-vanadium-hss","title":"Osg 2941001 Spiral Flute Tap 5\/16-18 Unc Vanadium Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe OSG 2941001 is a spiral flute tap designed for threading 5\/16-18 UNC right-hand threads in a variety of ferrous materials. It features 3 right-hand spiral flutes with a 45-degree helix angle, which evacuates chips upward out of the hole during tapping  -  a critical advantage in blind-hole applications. The tap is ground from 3% vanadium high-speed steel (HSS) and finished with a steam oxide coating to reduce friction and improve lubricity during cutting. The modified bottoming chamfer allows threading close to the bottom of blind holes. Overall length is 2-23\/32 inches with a thread limit designation of H7, indicating a slight oversize tolerance suitable for plated threads.\u003c\/p\u003e\n\u003cp\u003eThis tap is suited for use in job shops, maintenance and repair operations, and production environments where blind-hole tapping of ferrous materials is required. Compatible materials include alloy steel, carbon steel, cast iron, stainless steel, die steel, and hardened steel. The 45-degree helix angle makes it particularly effective in materials that produce long, stringy chips. It is typically used in drill press, CNC machining center, and manual tapping operations where a tapping driver or synchronized spindle is available.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e5\/16-18 UNC thread form with right-hand direction and H7 thread limit tolerance\u003c\/li\u003e\n  \u003cli\u003e45-degree helix angle promotes upward chip evacuation in blind-hole tapping\u003c\/li\u003e\n  \u003cli\u003eModified bottoming chamfer for threading close to the bottom of blind holes\u003c\/li\u003e\n  \u003cli\u003e3% vanadium HSS construction for improved wear resistance over standard M2 HSS\u003c\/li\u003e\n  \u003cli\u003eSteam oxide coating reduces friction and galling during thread cutting\u003c\/li\u003e\n  \u003cli\u003eRated for 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\u003eThe OSG 2941001 is part of the OSG Series 290 spiral flute tap line and is designed for tapping 5\/16-18 UNC blind holes 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\u003eThis tap is intended for installation by machinists and tool and die technicians using a tapping driver, tapping head, or CNC rigid-tapping spindle. Ensure the tap is properly aligned with the drilled hole before engagement to prevent cross-threading or tap breakage. Use a suitable cutting fluid or tapping compound appropriate for the workpiece material. Never reverse a spiral flute tap under power without confirming the machine supports synchronized reversal.\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 UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThreads per Inch\u003c\/strong\u003e: 18\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H7\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfer\u003c\/strong\u003e: Modified Bottoming\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\u003eHelix Angle\u003c\/strong\u003e: 45 degrees\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: 0.3180 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\u003eMaterial\u003c\/strong\u003e: 3% 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\u003eMaterial Application\u003c\/strong\u003e: Alloy Steel, Carbon Steel, Cast Iron, Stainless Steel, Die Steel, Hardened Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOversize\u003c\/strong\u003e: Yes\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: 0.049 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: 2941001\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51739751350578,"sku":"2941001","price":56.71,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/d28dedac2b84ce69357cf4b6986a3891.jpg?v=1788818494","url":"https:\/\/voomisupply.com\/products\/osg-2941001-spiral-flute-tap-5-16-18-unc-vanadium-hss","provider":"Voomi Supply","version":"1.0","type":"link"}