{"product_id":"import-bdna-20737-straight-flute-tap-1-4-20-unc-bottoming","title":"Import BDNA-20737 Straight Flute Tap 1\/4-20 Unc Bottoming","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe IMPORT BDNA-20737 is a straight flute bottoming tap designed for cutting internal 1\/4-20 UNC right-hand threads in through-holes and blind holes where full thread depth close to the bottom of the hole is required. Manufactured from high-speed steel and finished with a gold oxide coating for added lubricity and corrosion resistance, this tap features 4 flutes and an H3 thread limit for consistent tolerance control. It is sized for 1\/4-20 UNC thread standard and is suited for production and maintenance threading operations performed by machinists, pipefitters, and general trade professionals working with ferrous and non-ferrous materials.\u003c\/p\u003e\n\u003cp\u003eThis bottoming tap is used in applications where a taper or plug tap has already started the thread and the final pass must extend fully to the bottom of a blind hole. Common install scenarios include machine shop production runs, field repair threading on equipment, and bench work in industrial or mechanical maintenance environments. The 4-flute straight flute design is best suited for threading softer materials and shorter chipping operations.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e1\/4-20 UNC thread size with 20 threads per inch for standard inch-series fastener compatibility\u003c\/li\u003e\n  \u003cli\u003eBottoming chamfer style allows threading to the full depth of blind holes\u003c\/li\u003e\n  \u003cli\u003eHigh-speed steel construction provides durability across a range of workpiece materials\u003c\/li\u003e\n  \u003cli\u003eGold oxide coating improves surface lubricity and reduces galling during threading\u003c\/li\u003e\n  \u003cli\u003eH3 thread limit ensures consistent fit within standard UNC tolerance ranges\u003c\/li\u003e\n  \u003cli\u003e4-flute straight flute geometry suited for short-chip and softer materials\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard replacement or stock tap for 1\/4-20 UNC bottoming applications across general machining, maintenance, and fabrication work. Verify hole diameter and material hardness prior to use to confirm suitability.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis tap is installed by machinists or qualified trade professionals using a tap handle, T-handle wrench, or machine tapping setup. Always ensure the workpiece is securely fixtured and the pilot hole is drilled to the correct tap drill diameter for 1\/4-20 UNC threads before tapping. Apply cutting fluid appropriate for the workpiece material to extend tool life and improve thread quality. A bottoming tap should be used only after a taper or plug tap has already established the thread lead in blind hole applications.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/4-20 UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThreads per Inch\u003c\/strong\u003e: 20\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNC\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: H3\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfer Style\u003c\/strong\u003e: Bottoming\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: High-Speed Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Gold Oxide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.01 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\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: IMPORT\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: BDNA-20737\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"IMPORT-GENERIC","offers":[{"title":"Default Title","offer_id":51698895126834,"sku":"BDNA-20737","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/c682536689192b9e947eac208234548d.jpg?v=1788369539","url":"https:\/\/voomisupply.com\/products\/import-bdna-20737-straight-flute-tap-1-4-20-unc-bottoming","provider":"Voomi Supply","version":"1.0","type":"link"}