{"product_id":"import-bdna-20791-straight-flute-tap-1-2-20-unf-bottoming-hss","title":"Import BDNA-20791 Straight Flute Tap 1\/2-20 Unf Bottoming Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe IMPORT BDNA-20791 is a straight flute bottoming tap designed for cutting right-hand internal threads in pre-drilled holes. Built from high-speed steel with a gold oxide coating, this tap handles 1\/2-20 UNF threads with 4 flutes and an H3 thread limit tolerance. The bottoming chamfer allows threading close to the bottom of blind holes where plug or taper taps cannot reach. The gold oxide finish reduces friction and provides light corrosion resistance during use and storage. Machinists, maintenance technicians, and tool-and-die professionals use this tap for precision threading in metal fabrication and repair applications.\u003c\/p\u003e\u003cp\u003eThis tap is suited for threading blind holes to full depth in ferrous and non-ferrous metals. The 1\/2-20 UNF fine-thread specification makes it a common choice in automotive, hydraulic fitting, and precision mechanical assembly work where fine-thread engagement and controlled fit are required. The H3 tolerance class suits standard precision threading applications and pairs with H3-class tap drills for accurate hole preparation. It is sold individually and intended for use in manual tap handles or machine tapping operations at appropriate speeds for the work material.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eBottoming chamfer allows threading to the bottom of blind holes\u003c\/li\u003e\n\u003cli\u003e4 straight flutes for efficient chip clearance in through and blind hole applications\u003c\/li\u003e\n\u003cli\u003eHigh-speed steel construction provides hardness and wear resistance for metal threading\u003c\/li\u003e\n\u003cli\u003eGold oxide coating reduces friction and offers light corrosion protection\u003c\/li\u003e\n\u003cli\u003eH3 thread limit tolerance for standard precision fit requirements\u003c\/li\u003e\n\u003cli\u003eRight-hand thread cutting, 1\/2-20 UNF specification\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for cutting 1\/2-20 UNF right-hand internal threads. Compatible with standard 1\/2-inch tap handles and machine tapping chucks sized for this shank diameter.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eA licensed machinist or qualified technician should select the correct tap drill size for 1\/2-20 UNF threads before use. Secure the workpiece fully before tapping to prevent movement. Apply cutting fluid appropriate for the work material to extend tap life and improve thread quality. Do not force the tap if resistance increases sharply — back off to break chips and prevent tap breakage.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/2-20\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNF\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThreads per Inch\u003c\/strong\u003e: 20\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 Type\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\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-20791\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"IMPORT-GENERIC","offers":[{"title":"Default Title","offer_id":51723939184946,"sku":"BDNA-20791","price":26.82,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/8d8b732e9387587df23d06ae168d706f.jpg?v=1788610315","url":"https:\/\/voomisupply.com\/products\/import-bdna-20791-straight-flute-tap-1-2-20-unf-bottoming-hss","provider":"Voomi Supply","version":"1.0","type":"link"}