{"product_id":"accupro-t1640425-spiral-point-tap-1-4-28-3-flutes-plug","title":"Accupro T1640425 Spiral Point Tap 1\/4-28 3 Flutes Plug","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe ACCUPRO T1640425 is a spiral point tap designed for cutting right-hand internal threads in through-hole applications. Built from HSS-E Vanadium high speed steel with an oxide finish, this tap delivers added wear resistance and lubricity during cutting operations. It is configured with a plug chamfer and 3 flutes, making it well-suited for machine tapping in production environments. The overall length is 2.5 inches, with a thread length of 0.748 inches and a shank diameter of 0.255 inches. Licensed machinists, tool-and-die makers, and maintenance technicians working in metal fabrication or industrial maintenance typically install and operate this tap.\u003c\/p\u003e\n\u003cp\u003eThis tap cuts 1\/4-28 UNF threads, a fine-pitch thread standard commonly found in precision assemblies, thin-walled components, and fastener applications where increased thread engagement is required. The H5 thread limit keeps finished threads within close tolerance, making it appropriate for controlled-fit fastener bores in steel, aluminum, and similar machinable metals. The spiral point design pushes chips forward ahead of the tap, which reduces clogging in through-hole work and allows for higher feed rates in automated or semi-automated tapping setups.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eHSS-E Vanadium construction for improved heat resistance and cutting edge retention\u003c\/li\u003e\n  \u003cli\u003eOxide finish reduces friction and provides moderate corrosion resistance during storage and use\u003c\/li\u003e\n  \u003cli\u003ePlug chamfer with 3 flutes supports efficient chip evacuation in through-hole tapping\u003c\/li\u003e\n  \u003cli\u003eH5 thread limit ensures close-tolerance thread production for precision fitment\u003c\/li\u003e\n  \u003cli\u003eRight-hand thread direction compatible with standard CNC and manual tapping equipment\u003c\/li\u003e\n  \u003cli\u003eNo coolant-through feature — suitable for flood coolant or cutting fluid applied externally\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for through-hole tapping of 1\/4-28 UNF threads in machinable metals using standard tap holders, tapping heads, and CNC machine tool spindles that accept straight-shank taps with a 0.255-inch shank diameter.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis tap should be installed and operated by qualified machinists or maintenance personnel familiar with tapping feeds, speeds, and cutting fluid requirements for the workpiece material. Always secure the workpiece and confirm the tap holder is properly aligned before beginning the tapping cycle to avoid tap breakage or thread damage. Apply an appropriate cutting fluid externally before and during the tapping operation to extend tool life and improve thread quality. Follow your facility and machine manufacturer guidelines for tapping speeds when using this tap in CNC or turret-style tapping equipment.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/4-28 UNF\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 3\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfer Type\u003c\/strong\u003e: Plug\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H5\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: HSS-E Vanadium High Speed Steel\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: 2.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.748 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.255 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNeck Length\u003c\/strong\u003e: 1.0 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.5 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: ACCUPRO\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: T1640425\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ACCUPRO","offers":[{"title":"Default Title","offer_id":51728706076978,"sku":"T1640425","price":26.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/b8c147d18e5708ac1ca037a1658b8cfe.jpg?v=1788695295","url":"https:\/\/voomisupply.com\/products\/accupro-t1640425-spiral-point-tap-1-4-28-3-flutes-plug","provider":"Voomi Supply","version":"1.0","type":"link"}