{"product_id":"osg-1734400-straight-flute-tap-5-8-11-unc-cobalt-plug","title":"Osg 1734400 Straight Flute Tap 5\/8-11 Unc Cobalt Plug","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 1734400 is a straight flute machine tap designed to cut internal 5\/8-11 UNC threads in ferrous materials. Built from cobalt high-speed steel with a bright, uncoated finish, it delivers reliable performance in tough workpiece materials where heat buildup and tool wear are primary concerns. The plug chamfer style eases thread entry and distributes cutting load across several leading threads. With 4 flutes and an H3 thread limit, this tap holds tight tolerances for a 3B class of fit, making it appropriate for precision threaded assemblies in industrial and manufacturing environments. Licensed machinists and toolroom professionals are the primary users of this tap.\u003c\/p\u003e\u003cp\u003eThis tap is suited for through-hole and blind-hole threading applications in alloy steel, cast iron, die steel, and hardened steel. The straight flute geometry works best in these short-chipping materials where chip evacuation back out of the hole is predictable and controlled. It is commonly used in manual tapping operations and CNC machining centers where coolant-through tooling is not required. The Series 305 designation identifies this as part of OSG standard machine tap line for general-purpose inch-thread production work.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCobalt high-speed steel construction for improved heat and wear resistance in hard ferrous materials\u003c\/li\u003e\n\u003cli\u003eBright, uncoated finish suited for use with cutting oil or soluble coolant applied externally\u003c\/li\u003e\n\u003cli\u003ePlug chamfer distributes cutting load over the first several threads for smooth entry\u003c\/li\u003e\n\u003cli\u003e4-flute straight design optimized for short-chipping materials including cast iron and alloy steel\u003c\/li\u003e\n\u003cli\u003eH3 thread limit holds 3B class of fit tolerances for precision threaded connections\u003c\/li\u003e\n\u003cli\u003eRight-hand thread cutting, no coolant-through required\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for threading 5\/8-11 UNC holes in alloy steel, cast iron, die steel, and hardened steel workpieces in machine tapping applications where straight flute geometry and external coolant delivery are appropriate.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis tap is installed in a standard tap holder or floating tap collet on a drill press, mill, or CNC machining center. Always ensure the tap is properly aligned to the pre-drilled hole before engagement to prevent tap breakage. Power down or de-energize the machine before changing tooling. Apply cutting oil or appropriate cutting fluid to the tap and workpiece when tapping to extend tool life and improve thread finish.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 5\/8-11 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: 11\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChamfer Type\u003c\/strong\u003e: Plug\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\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 1-13\/16 inches (1.811 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3-13\/16 inches (3.813 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.48 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquare Length\u003c\/strong\u003e: 0.5625 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquare Size\u003c\/strong\u003e: 0.36 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: 0.209 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\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: 1734400\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51732777042226,"sku":"1734400","price":94.93,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/94a2f3fb162014c409876ba62e59db48.jpg?v=1788746683","url":"https:\/\/voomisupply.com\/products\/osg-1734400-straight-flute-tap-5-8-11-unc-cobalt-plug","provider":"Voomi Supply","version":"1.0","type":"link"}