{"product_id":"kennametal-1540453-spiral-point-tap-4-40-unc-hss-bottoming","title":"Kennametal 1540453 Spiral Point Tap 4-40 Unc Hss Bottoming","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe KENNAMETAL 1540453 is a spiral point tap designed for cutting internal threads in through-hole and bottoming applications. Built from high speed steel (HSS) with a bright, uncoated finish, this tap produces a 4-40 UNC thread form with a right-hand thread direction. The bottoming chamfer allows threading close to the bottom of a blind hole. With 2 flutes and an H2 thread limit, it holds tight tolerances suitable for 2B and 3B class-of-fit requirements. Licensed machinists, tool-and-die workers, and maintenance technicians use this tap in production and repair work involving small-diameter fastener threads.\u003c\/p\u003e\n\u003cp\u003eThis tap is suited for use in cast iron and non-ferrous metals such as aluminum, brass, and copper. The spiral point geometry pushes chips forward ahead of the cutting zone, making it effective in through-hole applications where chip evacuation is straightforward. At 1.875 inches overall length with a 0.563-inch thread length and a 0.141-inch shank diameter, it fits standard tap holders and chucks used for small fractional-inch tapping operations in both manual and CNC-assisted setups.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e4-40 UNC thread form with right-hand cutting direction\u003c\/li\u003e\n  \u003cli\u003eBottoming chamfer for threading close to the base of a blind hole\u003c\/li\u003e\n  \u003cli\u003eH2 thread limit for consistent 2B and 3B class-of-fit tolerances\u003c\/li\u003e\n  \u003cli\u003eHigh speed steel construction provides durability in cast iron and non-ferrous metals\u003c\/li\u003e\n  \u003cli\u003eBright uncoated finish — no coating buildup to affect thread dimensions\u003c\/li\u003e\n  \u003cli\u003eSpiral point flute design advances chips forward to keep the cutting zone clear\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style cutting tool replacement for applications requiring a 4-40 UNC spiral point tap in high speed steel with an H2 thread limit and bottoming chamfer. Material applications include cast iron and non-ferrous metals as specified by the manufacturer.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis tap is installed and operated by machinists, toolmakers, or maintenance technicians using a standard tap wrench, tapping head, or CNC rigid-tapping setup sized for small-diameter taps. Always secure the workpiece and confirm the pilot hole diameter matches the recommended tap drill size for 4-40 UNC before beginning. Apply appropriate cutting fluid for the workpiece material to extend tap life and improve thread quality. Do not exceed the tap's rated capacity by forcing it through harder materials than specified.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 4-40\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfer Type\u003c\/strong\u003e: Bottoming\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: H2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: High Speed Steel (HSS)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Bright\/Uncoated\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 1.875 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.563 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.141 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Application\u003c\/strong\u003e: Cast Iron, Non-Ferrous Metal\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: 5302\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMeasurement Type\u003c\/strong\u003e: Fractional Inch\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: 1540453\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KENNAMETAL","offers":[{"title":"Default Title","offer_id":51750667944242,"sku":"1540453","price":42.56,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/a45840d8278e29cd8e7c5a265ed21e4d.jpg?v=1788918143","url":"https:\/\/voomisupply.com\/products\/kennametal-1540453-spiral-point-tap-4-40-unc-hss-bottoming","provider":"Voomi Supply","version":"1.0","type":"link"}