{"product_id":"hertel-k008529as-straight-flute-tap-1-2-20-unf-hss","title":"Hertel K008529AS Straight Flute Tap 1\/2-20 Unf Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HERTEL K008529AS is a straight flute tap designed to cut internal threads in a wide range of materials encountered in precision machining, maintenance, and fabrication work. Built from high-speed steel (HSS) with a bright\/uncoated finish, it cuts a 1\/2-20 UNF right-hand thread to a 3B class of fit with an H3 thread limit. The taper chamfer — typically 7 to 10 threads — eases the tap into the starting hole and helps distribute cutting load across multiple flutes. With 4 flutes and a 3.375-inch overall length, this tap suits through-hole and short blind-hole applications where chip flow is not severely restricted.\u003c\/p\u003e\u003cp\u003eThis tap is appropriate for general-purpose threading in ferrous and non-ferrous metals, plastics, and similar machinable materials. It fits production, job-shop, and field-maintenance scenarios where a taper-start tap is the preferred entry for starting a new thread or re-tapping a damaged hole. Machinists, toolmakers, and maintenance technicians working on equipment that uses 1\/2-20 UNF fasteners will find this a standard go-to tool for hand tapping or low-speed machine tapping operations.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e1\/2-20 UNF thread form with H3 thread limit for consistent 3B class of fit\u003c\/li\u003e\n\u003cli\u003eTaper chamfer distributes cutting load for easier thread entry and reduced tap breakage risk\u003c\/li\u003e\n\u003cli\u003e4-flute straight design suitable for through holes and short blind holes in most common materials\u003c\/li\u003e\n\u003cli\u003eHigh-speed steel construction provides good wear resistance across a broad range of workpiece materials\u003c\/li\u003e\n\u003cli\u003eBright\/uncoated finish allows direct inspection of tool wear and is compatible with most cutting fluids\u003c\/li\u003e\n\u003cli\u003eRight-hand thread direction — standard for the vast majority of UNF fastener applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a general-purpose OEM-style straight flute tap for applications requiring a 1\/2-20 UNF internal thread to 3B class of fit tolerances.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis tap is installed by machinists or maintenance technicians using a tap wrench, T-handle, or low-speed tapping head. Ensure the workpiece is securely fixtured and the pilot hole is drilled to the correct tap drill size for a 1\/2-20 UNF thread before starting. Apply an appropriate cutting fluid for the workpiece material and reverse direction periodically during hand tapping to break chips. Never force the tap against excessive resistance — back it out to clear chips before continuing to reduce the risk of 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\u003eClass of Fit\u003c\/strong\u003e: 3B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChamfer Type\u003c\/strong\u003e: Taper\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3.375 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: Bright\/Uncoated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1.25 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: HERTEL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: K008529AS\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51754761486642,"sku":"K008529AS","price":38.62,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/720a3e8bdcbe4c5593a45d9dacda6743.jpg?v=1788948523","url":"https:\/\/voomisupply.com\/products\/hertel-k008529as-straight-flute-tap-1-2-20-unf-hss","provider":"Voomi Supply","version":"1.0","type":"link"}