{"product_id":"osg-1739100-straight-flute-tap-5-16-24-unf-cobalt","title":"Osg 1739100 Straight Flute Tap 5\/16-24 Unf Cobalt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe OSG 1739100 is a straight flute machine tap designed to cut 5\/16-24 UNF internal threads in a plug chamfer configuration. Built from cobalt high-speed steel with a bright\/uncoated finish, it is engineered for use in harder ferrous materials where heat resistance and edge retention are priorities. The tap runs a right-hand thread direction, carries a 3B class of fit with an H3 thread limit, and features 4 flutes for chip clearance in through-hole and shallow blind-hole applications. It is part of OSG Series 305 and is suited for production machining environments where consistent thread quality is required.\u003c\/p\u003e\n\u003cp\u003eThis tap is intended for machine tapping operations in shop and production settings. Its cobalt construction makes it appropriate for threading alloy steel, cast iron, die steel, and hardened steel. The plug chamfer — typically 3 to 5 lead threads — allows the tap to start easily in a previously drilled hole and is the most common chamfer style for general-purpose through-hole threading. Machinists and tool-and-die professionals will find this tap suitable for CNC machining centers, drill presses, and tapping arms where a rigid or semi-rigid tapping setup is used.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e5\/16-24 UNF thread form with right-hand direction and 3B class of fit\u003c\/li\u003e\n  \u003cli\u003eH3 thread limit for controlled tolerance in precision threading\u003c\/li\u003e\n  \u003cli\u003eCobalt high-speed steel construction for extended tool life in hard and abrasive ferrous materials\u003c\/li\u003e\n  \u003cli\u003e4-flute straight flute design provides chip clearance in through-hole applications\u003c\/li\u003e\n  \u003cli\u003ePlug chamfer for easy hole entry and versatile use in through or shallow blind holes\u003c\/li\u003e\n  \u003cli\u003eBright\/uncoated finish — no coating buildup to affect thread tolerance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eRated for use in alloy steel, cast iron, die steel, and hardened steel. Designed for machine tapping operations requiring a 5\/16-24 UNF, 3B class of fit, H3 limit straight flute plug tap.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis tap is intended for installation by machinists and tool-and-die professionals using rigid or floating tapping holders on CNC machining centers, drill presses, or dedicated tapping machines. Ensure the workpiece is securely fixtured and that the tap is properly aligned with the drilled pilot hole before engagement. Use appropriate cutting fluid for the workpiece material to reduce heat buildup and extend tool life. Do not reverse the tap under power without confirming the tapping head supports back-out to avoid breakage in harder materials.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 5\/16-24 UNF\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNF\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThreads per Inch\u003c\/strong\u003e: 24\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: H3\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfer\u003c\/strong\u003e: Plug\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 1.125 inches (1-1\/8 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.719 inches (2-23\/32 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\u003eMaterial\u003c\/strong\u003e: Cobalt High-Speed Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Bright\/Uncoated\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Application\u003c\/strong\u003e: Alloy Steel, Cast Iron, Die Steel, Hardened Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 305\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.06 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: 1739100\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51732630798642,"sku":"1739100","price":35.45,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/43d110a30a16619f846a86ac8538f2ee.jpg?v=1788745215","url":"https:\/\/voomisupply.com\/products\/osg-1739100-straight-flute-tap-5-16-24-unf-cobalt","provider":"Voomi Supply","version":"1.0","type":"link"}