{"product_id":"eagle-cutting-tool-ht-448-b-i-4-48-hss-hand-bottom-tap","title":"Eagle Cutting Tool HT-448-B-I 4-48 Hss Hand Bottom Tap","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe EAGLE CUTTING TOOL HT-448-B-I is a 4-48 UNF high-speed steel (HSS) hand bottom tap designed for cutting internal threads to the bottom of blind holes. The bottom tap geometry features minimal chamfer on the leading threads, allowing full thread engagement close to the base of a drilled hole. This tap is intended for hand tapping operations and is well suited for precision threading work in metalworking and light fabrication environments. It is installed and used by machinists, maintenance technicians, and skilled tradespeople working with small-diameter fastener applications.\u003c\/p\u003e\u003cp\u003eThis tap is suited for threading blind holes in ferrous and non-ferrous metals where full thread depth at the bottom of the hole is required. The 4-48 designation indicates a No. 4 screw size with 48 threads per inch, a fine-pitch unified thread commonly found in precision instruments, electronics enclosures, and small mechanical assemblies. It performs well in manual tapping setups using a standard tap wrench or T-handle.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eBottom tap style for threading to the base of blind holes with minimal runout\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 for durability across a range of metals\u003c\/li\u003e\n\u003cli\u003eDesigned for hand tapping operations with standard tap wrenches\u003c\/li\u003e\n\u003cli\u003eLightweight at 0.31 pounds for easy handling\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard 4-48 UNF hand bottom tap suitable for use wherever a No. 4-48 fine-thread tap is required in manual threading applications.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eHand tapping should be performed by a qualified machinist or experienced technician using an appropriate tap wrench sized for small taps. Ensure the workpiece is securely clamped before beginning the tapping operation. Apply cutting fluid or tapping oil to reduce friction and extend tap life. Back off the tap periodically to break chips and prevent tap breakage, especially in blind hole applications.\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: Hand Bottom Tap\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: High-Speed Steel (HSS)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.31 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-I\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"EAGLE CUTTING TOOL","offers":[{"title":"Default Title","offer_id":51233546731826,"sku":"HT-448-B-I","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/307622878.png?v=1780102802","url":"https:\/\/voomisupply.com\/products\/eagle-cutting-tool-ht-448-b-i-4-48-hss-hand-bottom-tap","provider":"Voomi Supply","version":"1.0","type":"link"}