{"product_id":"hertel-k008319as-straight-flute-tap-1-4-20-unc-hss","title":"Hertel K008319AS Straight Flute Tap 1\/4-20 Unc Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HERTEL K008319AS is a straight flute tap designed to cut internal threads in a wide range of materials using conventional tapping techniques. Built from high-speed steel with a bright uncoated finish, it produces a 1\/4-20 UNC right-hand thread to a 3B class of fit with an H3 thread limit. The taper chamfer — typically 8 to 10 threads — guides the tap into the hole gradually, making it well-suited for through-hole applications where chip clearance is managed from the entry side. Overall length is 2.5 inches. This tap is a standard choice for machinists, maintenance technicians, and tool-and-die professionals working in steel, cast iron, aluminum, and similar materials.\u003c\/p\u003e\n\u003cp\u003eThis tap is appropriate for use in manual tapping operations with a tap wrench or in low-speed machine tapping setups where a straight flute geometry is preferred. The 1\/4-20 UNC thread form is one of the most common unified coarse thread sizes found in general-purpose fastening applications across industrial, HVAC, electrical, and mechanical assembly work. It is intended for through-hole tapping where chips can exit ahead of the tap.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e1\/4-20 UNC thread form with right-hand thread direction\u003c\/li\u003e\n  \u003cli\u003eTaper chamfer for gradual thread engagement and easier starting\u003c\/li\u003e\n  \u003cli\u003eH3 thread limit for consistent fit within 3B class of fit tolerances\u003c\/li\u003e\n  \u003cli\u003e4 straight flutes for chip clearance in through-hole applications\u003c\/li\u003e\n  \u003cli\u003eHigh-speed steel construction for durability across a broad range of workpiece materials\u003c\/li\u003e\n  \u003cli\u003eBright uncoated finish — no additional surface treatment, ready for immediate use\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard replacement or stock tap for any application requiring a 1\/4-20 UNC taper tap with an H3 thread limit and 3B class of fit. Compatible with standard square-drive tap wrenches and machine tap holders accepting the appropriate shank diameter.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eTapping operations should be performed by a qualified machinist or maintenance technician. Always ensure the workpiece is securely clamped and the tap is properly aligned perpendicular to the hole before beginning. Use an appropriate cutting fluid to extend tool life and improve thread quality. Back the tap off periodically to break chips, and never force a tap that meets resistance, as this can cause breakage.\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\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNC\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\u003eChamfer Type\u003c\/strong\u003e: Taper\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Right Hand\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: 2.5 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: 0.35 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 23241600\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: K008319AS\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51737417515314,"sku":"K008319AS","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/f8520c61a31aa585fcda3703321c88a9.jpg?v=1788788284","url":"https:\/\/voomisupply.com\/products\/hertel-k008319as-straight-flute-tap-1-4-20-unc-hss","provider":"Voomi Supply","version":"1.0","type":"link"}