{"product_id":"kennametal-5703879-spiral-flute-tap-1-4-20-unc-bottoming-3b","title":"Kennametal 5703879 Spiral Flute Tap 1\/4-20 Unc Bottoming 3B","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe KENNAMETAL 5703879 is a spiral flute tap designed for threading 1\/4-20 UNC holes to a bottoming chamfer with a 3B class of fit. Manufactured from powdered metal vanadium high speed steel, it carries a multi-layer nitride and oxide coating suited for demanding cutting applications. The tap runs a right-hand, slow-helix flute geometry at a 10-degree helix angle across three flutes, with an overall length of 2.5 inches and a thread length of 0.44 inches (11.10 mm). It is used in applications involving high-temperature alloys and nickel alloys, where controlled chip evacuation and coating durability are critical. Licensed tradespeople and precision machinists install this tool in manual or CNC tapping operations.\u003c\/p\u003e\n\u003cp\u003eThis tap is rated for primary workpiece materials in the S-category, which covers high-temp alloys and nickel-based materials. The bottoming chamfer style allows threading close to the bottom of blind holes, making it well suited for tight-tolerance blind-hole applications in aerospace, defense, and industrial manufacturing environments. With a tapping depth of 1.00 inch (26.00 mm) and a shank diameter of 0.255 inches (6.48 mm), it fits standard tap holders used in production and maintenance machining operations.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eBottoming chamfer for threading close to the bottom of blind holes\u003c\/li\u003e\n  \u003cli\u003eMulti-layer nitride and oxide coating for wear resistance in high-temp alloy materials\u003c\/li\u003e\n  \u003cli\u003e3 right-hand spiral flutes with 10-degree slow helix angle for controlled chip movement\u003c\/li\u003e\n  \u003cli\u003eH3 thread limit with 3B class of fit for consistent thread tolerance\u003c\/li\u003e\n  \u003cli\u003ePowdered metal vanadium high speed steel construction for increased toughness and edge retention\u003c\/li\u003e\n  \u003cli\u003eNo coolant-through requirement, compatible with standard external coolant delivery\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style threading tool for 1\/4-20 UNC blind-hole tapping operations in high-temperature alloys and nickel alloys, classified under primary workpiece material code S. Part of the KENNAMETAL T694 series.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a qualified machinist or toolroom technician using a properly sized tap holder or collet chuck matched to the 0.255-inch shank diameter. Ensure the machine spindle and workpiece are fully secured before tool engagement. Apply cutting fluid appropriate for the workpiece material to the tap and hole entry before beginning the tapping cycle. Do not exceed the rated tapping depth of 1.00 inch to avoid tool breakage in blind-hole applications.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/4-20\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNC\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\u003eChamfer Style\u003c\/strong\u003e: 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: 10 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Style\u003c\/strong\u003e: Slow\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.44 inches (11.10 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTapping Depth\u003c\/strong\u003e: 1.00 inch (26.00 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.255 inches (6.48 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNeck Length\u003c\/strong\u003e: 0.56 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Powdered Metal Vanadium High Speed Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Multi-layer Nitride and Oxide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: High-Temp Alloy, Nickel Alloy (Material Code S)\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: T694\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 23241600\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1 pound\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: KENNAMETAL\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 5703879\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KENNAMETAL","offers":[{"title":"Default Title","offer_id":51753937142066,"sku":"5703879","price":79.02,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/7a5307a32731621853504c4dd8cc7dde.jpg?v=1788942185","url":"https:\/\/voomisupply.com\/products\/kennametal-5703879-spiral-flute-tap-1-4-20-unc-bottoming-3b","provider":"Voomi Supply","version":"1.0","type":"link"}