{"product_id":"kennametal-5455891-spiral-point-tap-12-28-unf-hss-e-oxide","title":"Kennametal 5455891 Spiral Point Tap 12-28 Unf Hss-e Oxide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe KENNAMETAL 5455891 is a spiral point tap designed for through-hole threading in a 12-28 UNF thread form. It is manufactured from HSS-E (high-speed steel with cobalt enhancement), which provides elevated heat and wear resistance compared to standard HSS. An oxide coating adds additional lubricity and corrosion protection. The tap features a plug chamfer for standard through-hole entry and a right-hand thread direction with an H3 thread limit, targeting a 2B\/3B class of fit. With a 2-flute configuration and spiral point geometry, it pushes chips forward ahead of the cut, making it suited for production tapping in through-hole applications.\u003c\/p\u003e\n\u003cp\u003eThis tap is intended for through-hole threading operations in steel, stainless steel, and cast iron. The 12-28 UNF designation covers fine-thread fastener holes common in precision mechanical assemblies, instrumentation, and light structural applications. It is appropriate for use in CNC machining centers, drill presses, and tapping heads where through-hole conditions allow forward chip evacuation. The T820 series is designed for production environments where consistent thread quality and tool life are required. Machinists and toolroom technicians are the primary users.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSpiral point geometry pushes chips forward for efficient through-hole evacuation\u003c\/li\u003e\n  \u003cli\u003eHSS-E (cobalt-enhanced high-speed steel) construction for improved heat and wear resistance\u003c\/li\u003e\n  \u003cli\u003eOxide coating provides lubricity and surface protection during tapping\u003c\/li\u003e\n  \u003cli\u003ePlug chamfer for standard through-hole entry and lead-in\u003c\/li\u003e\n  \u003cli\u003eH3 thread limit targeting 2B\/3B class of fit for general-purpose UNF threads\u003c\/li\u003e\n  \u003cli\u003eNo coolant-through requirement — compatible with flood or brush-applied cutting fluid\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for through-hole threading in steel, stainless steel, and cast iron workpieces requiring a 12-28 UNF thread form with a 2B\/3B class of fit. Part of the KENNAMETAL T820 series.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis tap should be installed and operated by qualified machinists familiar with tapping speeds, feeds, and cutting fluid requirements for the workpiece material. Power down and de-energize any machine tool before loading or changing tooling. Use an appropriate tap holder or floating chuck to reduce axial loading and prevent tap breakage. Always verify hole depth and through-hole clearance before tapping to ensure chip evacuation is unobstructed.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 12-28 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: 28\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClass of Fit\u003c\/strong\u003e: 2B\/3B\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H3\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfer\u003c\/strong\u003e: Plug\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStyle\u003c\/strong\u003e: Spiral Point\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication\u003c\/strong\u003e: Through-Hole Threading\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: HSS-E\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: KSP39\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Oxide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.375 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNeck Length\u003c\/strong\u003e: 0.46 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.22 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Pitch\u003c\/strong\u003e: 0.0357 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInterrupted Thread\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: T820\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.1 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: KENNAMETAL\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 5455891\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KENNAMETAL","offers":[{"title":"Default Title","offer_id":51732692861234,"sku":"5455891","price":45.93,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/861d04fdd0d65732ca5807df8952d8d4_54213eb9-6cea-4e12-b050-dbe82dbe18f7.jpg?v=1788745781","url":"https:\/\/voomisupply.com\/products\/kennametal-5455891-spiral-point-tap-12-28-unf-hss-e-oxide","provider":"Voomi Supply","version":"1.0","type":"link"}