{"product_id":"import-bdna-20690-tap-set-5-8-11-unc-hss-gold-oxide","title":"Import BDNA-20690 Tap Set 5\/8-11 Unc Hss Gold Oxide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe IMPORT BDNA-20690 is a 3-piece tap set designed for cutting 5\/8-11 UNC internal threads in metal workpieces. The set includes bottoming, plug, and taper chamfer taps, allowing a technician to start, progress, and finish a threaded hole in sequence. All three taps are ground from high-speed steel (HSS) with a gold oxide finish to reduce friction and improve chip flow. Each tap features 4 flutes and carries an H3 thread limit for consistent tolerance control. Overall length is 3-13\/16 inches. This set is used by machinists, maintenance mechanics, and trade professionals who need to create or restore 5\/8-11 UNC threads in steel, cast iron, or similar ferrous materials.\u003c\/p\u003e\u003cp\u003eThe BDNA-20690 tap set is suited for general metalworking, maintenance and repair operations (MRO), and fabrication environments where 5\/8-11 UNC threads are required. The three-chamfer configuration makes it practical for both through-hole and blind-hole applications. Taper chamfer taps are used to start the thread, plug taps continue it, and bottoming taps finish threads to the bottom of blind holes. This set covers the full sequence in one package, reducing the need to source individual taps separately.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eThree-piece set includes bottoming, plug, and taper chamfer taps for full thread progression\u003c\/li\u003e\n\u003cli\u003e5\/8-11 UNC thread form for standard unified coarse thread applications\u003c\/li\u003e\n\u003cli\u003e4-flute design promotes chip evacuation and thread accuracy\u003c\/li\u003e\n\u003cli\u003eHigh-speed steel construction provides hardness and wear resistance in ferrous materials\u003c\/li\u003e\n\u003cli\u003eGold oxide finish reduces friction and provides light corrosion resistance during storage and use\u003c\/li\u003e\n\u003cli\u003eH3 thread limit ensures consistent fit with standard UNC fastener tolerances\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for cutting 5\/8-11 UNC threads per the Unified National Coarse thread standard. Suitable for use with standard 5\/8-11 UNC tapping drill sizes in steel, cast iron, and similar materials.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eTap installation should be performed by a qualified machinist or maintenance mechanic familiar with proper tapping technique and speeds. Always use an appropriate cutting fluid or tapping oil to extend tool life and improve thread quality. Secure the workpiece firmly before threading and align the tap perpendicular to the hole. Back the tap out periodically to break chips, 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: 5\/8-11 UNC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChamfer Types\u003c\/strong\u003e: Bottoming, Plug, Taper\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: High-Speed Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3-13\/16 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Gold Oxide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePieces\u003c\/strong\u003e: 3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.01 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: IMPORT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: BDNA-20690\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"IMPORT-GENERIC","offers":[{"title":"Default Title","offer_id":51714245132594,"sku":"BDNA-20690","price":119.06,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/8036fba758f3936453f4f58aa82f5d3a.jpg?v=1788498133","url":"https:\/\/voomisupply.com\/products\/import-bdna-20690-tap-set-5-8-11-unc-hss-gold-oxide","provider":"Voomi Supply","version":"1.0","type":"link"}