{"product_id":"accupro-t2634585-spiral-flute-tap-1-2-20-3-flute","title":"Accupro T2634585 Spiral Flute Tap 1\/2-20 3 Flute","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe ACCUPRO T2634585 is a spiral flute tap designed for cutting 1\/2-20 UNF internal threads in through-holes and blind-hole applications where chip evacuation is critical. Built from 3% vanadium high speed steel (HSS), this tap offers increased wear resistance compared to standard M2 HSS, making it well suited for production threading in steel, stainless steel, and similar ferrous materials. The modified bottoming chamfer allows threading closer to the bottom of a blind hole while still providing enough lead-in for stable thread initiation. At 3.375 inches overall length, it fits standard tap holders and machine spindles used in CNC machining centers, drill presses, and manual tapping operations.\u003c\/p\u003e\n\u003cp\u003eThis tap is intended for machinists, toolroom technicians, and production floor operators threading 1\/2-20 UNF fastener holes in metal workpieces. The 3-flute spiral design with a 33-degree helix angle pulls chips up and out of the hole, making it especially effective in blind-hole applications where chip packing is a common problem. The bright uncoated finish suits general-purpose threading with standard cutting fluids. It carries a 2B class of fit, producing threads compatible with standard 2A threaded fasteners across most industrial and mechanical assembly applications.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e1\/2-20 UNF thread form with 2B class of fit for standard tolerance threaded assemblies\u003c\/li\u003e\n  \u003cli\u003e3% vanadium HSS construction for improved wear resistance over standard HSS\u003c\/li\u003e\n  \u003cli\u003e33-degree right-hand spiral flute helix evacuates chips out of blind holes\u003c\/li\u003e\n  \u003cli\u003eModified bottoming chamfer allows threading close to hole bottom\u003c\/li\u003e\n  \u003cli\u003eH5 thread limit for consistent fit across production runs\u003c\/li\u003e\n  \u003cli\u003eBright uncoated finish compatible with most water-soluble and oil-based cutting fluids\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style tooling replacement for standard 1\/2-20 UNF spiral flute tap applications in manual and CNC tapping setups. No specific machine or holder compatibility was stated by the manufacturer for this part number.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation and use should be performed by a qualified machinist or toolroom technician familiar with tapping speeds, feeds, and cutting fluid requirements for the workpiece material. Secure the tap in a rigid tap holder or floating tap adapter to reduce the risk of breakage; never run a tap in a plain drill chuck without float on a CNC machine. Ensure the pilot hole diameter is correct for the 1\/2-20 UNF thread form before beginning the tapping operation. Always back the tap out periodically to clear chips when threading deep blind holes, even with the spiral flute design assisting evacuation.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/2-20 UNF\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 3\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Style\u003c\/strong\u003e: Medium Spiral\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHelix Angle\u003c\/strong\u003e: 33 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfer Type\u003c\/strong\u003e: Modified Bottoming\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClass of Fit\u003c\/strong\u003e: 2B\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H5\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3.375 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 9.32 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 21.00 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: 3% Vanadium High Speed Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Bright\/Uncoated\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: 0.17 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: T2634585\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ACCUPRO","offers":[{"title":"Default Title","offer_id":51747504128306,"sku":"T2634585","price":64.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/c7243b8339fc5ec60cadc4cf6965345f.jpg?v=1788881504","url":"https:\/\/voomisupply.com\/products\/accupro-t2634585-spiral-flute-tap-1-2-20-3-flute","provider":"Voomi Supply","version":"1.0","type":"link"}