{"product_id":"kennametal-6140721-spiral-flute-tap-3-4-10-cobalt","title":"Kennametal 6140721 Spiral Flute Tap 3\/4-10 Cobalt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe KENNAMETAL 6140721 is a spiral flute tap designed for cutting 3\/4-10 UNC internal threads in ferrous workpiece materials. Built from cobalt high-speed steel with an oxide coating, it handles the heat and abrasion generated when tapping steel, stainless steel, and cast iron. The 45-degree helix angle evacuates chips upward through the flute, keeping the cutting zone clear in through-hole and moderately deep blind-hole applications. Four flutes and a modified bottoming chamfer allow threading close to the bottom of a hole without sacrificing tool stability. Overall length is 4.25 inches. Licensed machinists, tool-and-die makers, and maintenance technicians use this tap in manual or CNC tapping operations.\u003c\/p\u003e\u003cp\u003eThis tap is suited for production and maintenance applications in steel fabrication, machine shops, and heavy equipment repair. The modified bottoming chamfer provides a short lead-in — typically 1 to 2 threads — making it practical for blind holes where a plug or taper tap would leave unthreaded material too close to the hole bottom. Primary workpiece materials are steel, stainless steel, and cast iron. The H3 thread limit designates a ground thread tolerance appropriate for standard fit classes in UNC 3\/4-10 applications.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCobalt high-speed steel construction resists heat buildup when tapping stainless steel and alloy steels\u003c\/li\u003e\n\u003cli\u003e45-degree right-hand spiral flute geometry pulls chips out of the hole during tapping\u003c\/li\u003e\n\u003cli\u003eModified bottoming chamfer allows threading close to the bottom of blind holes\u003c\/li\u003e\n\u003cli\u003eOxide coating reduces friction and provides baseline lubricity at the cutting edge\u003c\/li\u003e\n\u003cli\u003eH3 thread limit ground tolerance for consistent fit in standard UNC assemblies\u003c\/li\u003e\n\u003cli\u003eNo coolant-through requirement — compatible with flood or manual lubrication setups\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style cutting tool replacement for 3\/4-10 UNC tapping applications in steel, stainless steel, and cast iron workpieces. The 0.59-inch shank diameter fits standard tap holders and chucks sized for 3\/4-inch taps.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified machinist or maintenance technician familiar with tapping operations. Secure the workpiece fully before engaging the tap, and ensure the tap is aligned perpendicular to the hole to prevent thread distortion or tool breakage. Always apply appropriate cutting fluid or tapping compound for the workpiece material — cobalt taps in stainless steel particularly benefit from sulfurized or chlorinated cutting oils. Inspect the tap for chipping or wear before each use; a damaged cutting edge in a blind hole can result in a broken tap that is difficult to extract.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 3\/4-10 UNC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChamfer Style\u003c\/strong\u003e: Modified Bottoming\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: Oxide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Right Hand\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\u003eThread Limit\u003c\/strong\u003e: H3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 4.25 inches (108 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 1.22 inches (31 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTapping Depth\u003c\/strong\u003e: 2.08 inches (53 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.59 inches (14.99 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 2.17 inches (55 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNeck Length\u003c\/strong\u003e: 0.86 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquare Size\u003c\/strong\u003e: 0.439 inches (11.15 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquare Length\u003c\/strong\u003e: 0.69 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Materials\u003c\/strong\u003e: Steel, Stainless Steel, Cast Iron\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1.3 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: KENNAMETAL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 6140721\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KENNAMETAL","offers":[{"title":"Default Title","offer_id":51730664325426,"sku":"6140721","price":299.91,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/32bcfbcf7fde86e0d2fa48811545429e_cf514faa-3713-49d3-86d0-8bbe4db6308e.jpg?v=1788721084","url":"https:\/\/voomisupply.com\/products\/kennametal-6140721-spiral-flute-tap-3-4-10-cobalt","provider":"Voomi Supply","version":"1.0","type":"link"}