{"product_id":"hertel-k008631as-straight-flute-tap-1-8-unc-bottoming-hss","title":"Hertel K008631AS Straight Flute Tap 1-8 Unc Bottoming Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HERTEL K008631AS is a straight flute bottoming tap designed to cut unified national coarse (UNC) internal threads in a 1-8 thread size. Built from high speed steel (HSS) with a bright uncoated finish, it delivers consistent thread form in through-holes and blind holes where full thread depth near the bottom is required. With 4 flutes and an H4 thread limit, this tap is suited for machinists and toolroom techs working in ferrous and non-ferrous materials where chip evacuation is manageable and dimensional accuracy is critical. Overall length is 5.125 inches.\u003c\/p\u003e\u003cp\u003eThis tap is used in general machining, maintenance repair, and manufacturing applications requiring UNC threaded holes. The bottoming chamfer  -  typically 1 to 2 thread leads  -  allows threading to within a few pitches of a blind hole bottom. Class 3B fit designation means it produces close-tolerance threads appropriate for precision assemblies. Right-hand thread direction follows standard practice for the majority of fastener applications in industrial and mechanical trade work.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eBottoming chamfer cuts threads close to the bottom of blind holes\u003c\/li\u003e\n\u003cli\u003e4 straight flutes provide chip control in shorter-chipping materials\u003c\/li\u003e\n\u003cli\u003eH4 thread limit supports consistent 3B class fit tolerances\u003c\/li\u003e\n\u003cli\u003eHigh speed steel construction handles a broad range of workpiece materials\u003c\/li\u003e\n\u003cli\u003eBright uncoated finish suitable for use with cutting fluid in standard machining operations\u003c\/li\u003e\n\u003cli\u003eRight-hand cut, 1-8 UNC thread form matches the most common coarse-thread fastener standard\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or direct-use straight flute bottoming tap for machine tool spindles and hand tapping setups requiring a 1-8 UNC thread form with 3B class fit.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eSecure the tap in a properly sized tap holder or tapping chuck before use; never run a bottoming tap into an unprepared hole without first using plug and taper taps to establish the thread lead. Ensure the workpiece is firmly fixtured and apply an appropriate cutting fluid for the base material to reduce heat and extend tool life. Inspect the tap for chipped or worn flutes before each use  -  a damaged tap in a blind hole can result in a broken tap extraction that damages the workpiece.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1-8\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChamfer Type\u003c\/strong\u003e: Bottoming\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\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: H4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 5.125 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: 3.9 pounds\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: K008631AS\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51743036178738,"sku":"K008631AS","price":154.82,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/2bdb2d041bbf21ecdc068bd086e0ef29.jpg?v=1788841834","url":"https:\/\/voomisupply.com\/products\/hertel-k008631as-straight-flute-tap-1-8-unc-bottoming-hss","provider":"Voomi Supply","version":"1.0","type":"link"}