{"product_id":"eagle-cutting-tool-ht-448-b-d-4-48-hss-bottom-tap","title":"Eagle Cutting Tool HT-448-B-D 4-48 Hss Bottom Tap","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe EAGLE CUTTING TOOL HT-448-B-D is a 4-48 UNF high-speed steel bottom tap manufactured in the USA. Bottom taps are ground with a near-zero lead chamfer, typically one to two threads, allowing the cutting flutes to reach the bottom of a blind hole and produce fully formed threads along nearly the entire depth of the bore. This tap is suited for threading small-diameter holes in ferrous and non-ferrous metals, plastics, and similar materials where thread depth must extend close to the bottom of the hole. At 0.04 pounds, it is a lightweight precision tool appropriate for bench work, CNC tapping, or hand-tapping operations.\u003c\/p\u003e\u003cp\u003eThe HT-448-B-D is used in machine shops, maintenance and repair operations, and light manufacturing environments where 4-48 UNF threads are required in blind holes. The 4-48 thread form is common in instrument assembly, electronics enclosures, and precision mechanical subassemblies. This tap is appropriate for use in drill presses, CNC machining centers, or by hand with a tap wrench, depending on the application and required tolerances.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eBottom chamfer geometry allows threading to near-bottom of blind holes\u003c\/li\u003e\n\u003cli\u003e4-48 UNF thread form for fine-pitch small-diameter applications\u003c\/li\u003e\n\u003cli\u003eHigh-speed steel (HSS) construction provides wear resistance for production and repeat use\u003c\/li\u003e\n\u003cli\u003eUSA manufactured for consistent dimensional accuracy and heat treatment\u003c\/li\u003e\n\u003cli\u003eLightweight at 0.04 pounds for easy handling and tool storage\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard 4-48 UNF bottom tap for use wherever that thread form is required in blind-hole applications across metalworking and precision assembly trades.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eMachinists and maintenance technicians should ensure the pilot hole is drilled to the correct tap drill size for 4-48 UNF threads before tapping. Use appropriate cutting fluid for the workpiece material to extend tap life and improve thread quality. Apply steady, even torque when tapping by hand and back off periodically to break chips and prevent tap breakage in deep blind holes. Never force a tap against the bottom of a blind hole without confirming adequate depth clearance.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 4-48 UNF\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTap Type\u003c\/strong\u003e: Bottom\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: High-Speed Steel (HSS)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e: USA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.04 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: EAGLE CUTTING TOOL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: HT-448-B-D\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"EAGLE CUTTING TOOL","offers":[{"title":"Default Title","offer_id":51233605157170,"sku":"HT-448-B-D","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/307622887.png?v=1780104422","url":"https:\/\/voomisupply.com\/products\/eagle-cutting-tool-ht-448-b-d-4-48-hss-bottom-tap","provider":"Voomi Supply","version":"1.0","type":"link"}