{"product_id":"hertel-k008083as-straight-flute-tap-4-40-unc-bottoming-hss","title":"Hertel K008083AS Straight Flute Tap 4-40 Unc Bottoming Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HERTEL K008083AS is a straight flute bottoming tap designed for threading 4-40 UNC holes in production and maintenance machining operations. Built from high-speed steel with a bright, uncoated finish, it cuts right-hand internal threads to a 2B and 3B class of fit with an H2 thread limit for consistent dimensional accuracy. The two-flute straight design channels chips out of shallow and through-hole applications where flute geometry is critical to thread quality. Overall length is 1-7\/8 inches with a 9\/16-inch thread length, making it suited for confined work envelopes. Machinists, toolmakers, and maintenance technicians use this tap on manual machines, CNC tapping cycles, and hand-tapping fixtures.\u003c\/p\u003e\n\u003cp\u003eThis tap is used wherever 4-40 UNC threads are required in metalworking, assembly, and repair contexts. Typical applications include tapping small-diameter holes in steel, aluminum, brass, and similar machinable materials. The bottoming chamfer allows threading to the bottom of blind holes where a taper or plug tap cannot reach full thread depth. It is commonly used in instrument manufacturing, electronics enclosures, light mechanical assemblies, and general machine shop work where fine, small-diameter threads are specified.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e4-40 UNC thread form with H2 thread limit for controlled dimensional tolerance\u003c\/li\u003e\n  \u003cli\u003eBottoming chamfer enables full thread depth in blind holes\u003c\/li\u003e\n  \u003cli\u003e2-flute straight flute design suits shallow and through-hole tapping\u003c\/li\u003e\n  \u003cli\u003eHigh-speed steel construction provides toughness across a range of machinable materials\u003c\/li\u003e\n  \u003cli\u003eBright, uncoated finish compatible with standard cutting fluids and tapping compounds\u003c\/li\u003e\n  \u003cli\u003eRight-hand thread direction for standard tapping operations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or standard tooling selection for any application requiring 4-40 UNC internal threads with a 2B or 3B class of fit. Fits standard tap holders and collet chucks sized for the appropriate shank diameter of a 4-40 tap.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eA licensed machinist or qualified technician should select the correct tap drill size per UNC standard tables before tapping. Apply an appropriate cutting fluid or tapping compound for the workpiece material to extend tool life and improve thread quality. Secure the workpiece firmly and ensure the tap is started square to the hole to prevent tap breakage, which is a significant risk with small-diameter taps. When tapping blind holes, advance carefully to avoid bottoming the tap under power.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTap Type\u003c\/strong\u003e: Straight Flute\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 4-40\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfer\u003c\/strong\u003e: Bottoming\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClass of Fit\u003c\/strong\u003e: 2B \/ 3B\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 9\/16 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length (OAL)\u003c\/strong\u003e: 1-7\/8 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: 0.11 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: K008083AS\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51744040714546,"sku":"K008083AS","price":21.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/dedd2d8b2e0a0c2663171b254b67f6f1.jpg?v=1788853396","url":"https:\/\/voomisupply.com\/products\/hertel-k008083as-straight-flute-tap-4-40-unc-bottoming-hss","provider":"Voomi Supply","version":"1.0","type":"link"}