{"product_id":"hertel-k008920as-tap-set-12-28-unf-4-flute-hss","title":"Hertel K008920AS Tap Set 12-28 Unf 4 Flute Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HERTEL K008920AS is a 3-piece tap set designed for cutting 12-28 UNF internal threads in metal workpieces. Built from high speed steel with a bright finish, it delivers consistent thread-cutting performance in ferrous and non-ferrous materials. The set features a 4-flute geometry with an H3 thread limit, sized at 2-3\/8 inches overall length, and is ground to a 2B and 3B class of fit. Machinists, maintenance technicians, and toolroom professionals use this tap set when threading 12-28 UNF holes by hand or under power in general manufacturing and repair applications.\u003c\/p\u003e\n\u003cp\u003eThis tap set is suited for production and maintenance environments where 12-28 UNF threaded holes are required. The UNF thread form is common in applications demanding finer thread pitch than UNC, including instrument assemblies, thin-wall components, and mechanical fastening where vibration resistance is a factor. The 3-piece set typically includes a taper, plug, and bottoming tap, enabling operators to thread through-holes and blind holes across a range of depth requirements.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e12-28 UNF thread form for fine-pitch threading applications\u003c\/li\u003e\n  \u003cli\u003eHigh speed steel construction for durability across ferrous and non-ferrous materials\u003c\/li\u003e\n  \u003cli\u003e4-flute design promotes chip clearance and thread accuracy\u003c\/li\u003e\n  \u003cli\u003eH3 thread limit for consistent fit within tolerance\u003c\/li\u003e\n  \u003cli\u003e2B and 3B class of fit coverage in a single 3-piece set\u003c\/li\u003e\n  \u003cli\u003eBright finish with no coating for easy visual inspection of cutting edge condition\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in standard 12-28 UNF threading operations. Compatible with tap handles and machine tap holders sized for number 12 taps. Verify holder and drive compatibility before use.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eSecure the workpiece firmly before threading to prevent movement during the cut. Apply appropriate cutting fluid for the material being tapped to extend tap life and improve thread finish. Always back off the tap periodically when hand-tapping to break chips and reduce the risk of tap breakage. Inspect the tap flutes and cutting edges before each use and replace worn or chipped taps to maintain thread quality.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 12-28 UNF\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\u003eOverall Length\u003c\/strong\u003e: 2-3\/8 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: UNF\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClass of Fit\u003c\/strong\u003e: 2B and 3B\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Bright\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePieces in Set\u003c\/strong\u003e: 3\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.1 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: HERTEL\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: K008920AS\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51746337784114,"sku":"K008920AS","price":45.77,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/b0c91342b3ad08aee60ec50e58ec6365.jpg?v=1788868593","url":"https:\/\/voomisupply.com\/products\/hertel-k008920as-tap-set-12-28-unf-4-flute-hss","provider":"Voomi Supply","version":"1.0","type":"link"}