{"product_id":"hertel-k011008as-straight-flute-tap-4-40-unc-hss","title":"Hertel K011008AS Straight Flute Tap 4-40 Unc Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HERTEL K011008AS is a straight flute plug tap designed for cutting right-hand internal threads in a 4-40 UNC thread form. Manufactured from high-speed steel with a bright, uncoated finish, this tap is built for threading operations in ferrous and non-ferrous materials where coolant-through capability is not required. The H7 thread limit designation indicates a slightly oversize tap ground to produce threads at the upper tolerance range, accommodating plating allowances or tighter fits as needed. With a 0.003-inch oversize specification, it is well suited for applications requiring post-thread plating or anodizing. Machinists and maintenance professionals commonly select this tap for small-diameter machine screw threads in tooling, fixtures, and precision assemblies.\u003c\/p\u003e\n\u003cp\u003eThis tap is used in general machining, toolroom, and maintenance repair operations where 4-40 UNC threads are required. Its plug chamfer — typically 3 to 5 threads of lead — makes it appropriate for through-hole threading or for following a bottoming pass in blind holes. The 3-flute straight flute geometry provides chip clearance in shorter thread depths and maintains stability in small-diameter work. It is suited to manual tapping with a tap wrench or machine tapping in a drill press or CNC machining center at appropriate low-RPM feeds for the material being threaded.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e4-40 UNC right-hand thread form for standard machine screw applications\u003c\/li\u003e\n  \u003cli\u003ePlug chamfer provides a gradual lead-in, suitable for through holes and most blind-hole work\u003c\/li\u003e\n  \u003cli\u003eHigh-speed steel construction offers toughness and regrindability across a broad range of workpiece materials\u003c\/li\u003e\n  \u003cli\u003eH7 thread limit with 0.003-inch oversize accommodates post-plating or anodizing allowances\u003c\/li\u003e\n  \u003cli\u003e3-flute straight flute design balances chip clearance and cutting edge strength at small diameters\u003c\/li\u003e\n  \u003cli\u003eBright uncoated finish allows for straightforward inspection of wear and regrind status\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard replacement or stocking tap for any application requiring 4-40 UNC right-hand internal threads. Compatible with manual tap wrenches, tapping heads, and CNC rigid-tapping setups configured for small-diameter, fine-pitch UNC threading.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis tap should be installed and operated by a qualified machinist familiar with small-diameter tapping procedures. Always secure the workpiece fully before beginning the threading operation, and use an appropriate cutting fluid for the workpiece material to extend tool life and improve thread quality. When machine tapping, verify that spindle speed and feed rate are set for the thread pitch and material before engaging the tap. Avoid excessive force — 4-40 is a small-diameter thread prone to breakage if the tap binds or is run dry.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\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\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfer Type\u003c\/strong\u003e: Plug\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 3\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H7\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAmount Oversize\u003c\/strong\u003e: 0.003 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.5625 inches (9\/16 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length (OAL)\u003c\/strong\u003e: 1.875 inches (1-7\/8 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.141 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: 0.12 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: K011008AS\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51736998347058,"sku":"K011008AS","price":29.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/0ddc5023b7184646575cfe2208727640.jpg?v=1788782942","url":"https:\/\/voomisupply.com\/products\/hertel-k011008as-straight-flute-tap-4-40-unc-hss","provider":"Voomi Supply","version":"1.0","type":"link"}