{"product_id":"import-bdna-20755-straight-flute-tap-12-28-unf-hss","title":"Import BDNA-20755 Straight Flute Tap 12-28 Unf Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe IMPORT BDNA-20755 is a straight flute plug tap designed for cutting 12-28 UNF internal threads in through-holes and shallow blind holes. Built from high-speed steel (HSS) with a gold oxide coating, this tap offers improved lubricity and modest corrosion resistance during cutting operations. It features 4 flutes and a plug chamfer, which distributes cutting load across several leading threads for controlled thread engagement. The overall length is 2.375 inches. Right-hand thread direction and an H3 thread limit make it suitable for standard tolerance threading applications in ferrous and non-ferrous materials.\u003c\/p\u003e\u003cp\u003eThis tap is used in machine shops, maintenance facilities, and field service applications where 12-28 UNF threaded holes are required. The plug chamfer style is the most common general-purpose choice, appropriate for both through-holes and holes with sufficient depth beyond the threaded section. It is compatible with standard tap wrenches and tapping heads. Machinists, tool-and-die techs, and mechanical maintenance trades install this type of tap routinely in production and repair work.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e12-28 UNF thread form for fine-pitch unified national thread applications\u003c\/li\u003e\n\u003cli\u003e4 straight flutes provide balanced cutting action and chip clearance\u003c\/li\u003e\n\u003cli\u003ePlug chamfer distributes entry load across multiple leading threads\u003c\/li\u003e\n\u003cli\u003eHigh-speed steel construction withstands heat generated during tapping\u003c\/li\u003e\n\u003cli\u003eGold oxide coating reduces friction and provides light corrosion protection\u003c\/li\u003e\n\u003cli\u003eH3 thread limit suits standard commercial tolerance fits\u003c\/li\u003e\n\u003cli\u003eRight-hand thread direction for conventional tapping operations\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a general-purpose replacement or stock tap for applications requiring 12-28 UNF internal threads. Compatible with standard tap wrench drives and tapping fixtures sized for the shank of a No. 12 tap.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eUse the correct drill size for a 12-28 UNF tap before threading to ensure proper thread engagement. Apply cutting fluid appropriate for the workpiece material to extend tap life and improve thread quality. Ensure the tap is started straight and perpendicular to the workpiece surface to avoid tap breakage. Back off periodically when hand-tapping to break chips, especially in deeper holes.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 12-28 UNF\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: 28\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChamfer Type\u003c\/strong\u003e: Plug\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\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\u003eOverall Length\u003c\/strong\u003e: 2.375 inches\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\u003eUNSPSC Code\u003c\/strong\u003e: 23241600\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-20755\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"IMPORT-GENERIC","offers":[{"title":"Default Title","offer_id":51693809140018,"sku":"BDNA-20755","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/658ca210cc0a5ae1713d827fb67b2f0e.jpg?v=1788317628","url":"https:\/\/voomisupply.com\/products\/import-bdna-20755-straight-flute-tap-12-28-unf-hss","provider":"Voomi Supply","version":"1.0","type":"link"}