{"product_id":"accupro-t1620162b-spiral-point-tap-4-40-plug-2b","title":"Accupro T1620162B Spiral Point Tap 4-40 Plug 2B","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ACCUPRO T1620162B is a spiral point tap designed for cutting 4-40 unified fine threads in through-hole applications. Built from 3% vanadium high-speed steel with an oxide coating, it delivers consistent thread quality in ferrous materials including stainless steel. The plug chamfer style guides the tap into the workpiece with a gradual lead-in, making it well suited for through-hole threading on production runs and repair work alike. This tap is used by machinists, maintenance technicians, and tool-and-die professionals who require reliable thread formation in small-diameter fastener applications.\u003c\/p\u003e\u003cp\u003eThis tap is intended for through-hole tapping where chips can be pushed forward and clear of the cutting zone. Its 3-flute spiral point geometry is particularly effective in stainless steel and other materials that produce stringy chips. The 2B class of fit produces standard commercial-grade threads compatible with 4-40 fastener assemblies found in electronic enclosures, precision instruments, and light mechanical assemblies. Right-hand thread direction is standard for conventional tapping operations.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e4-40 thread size with 2B class of fit for standard commercial thread tolerance\u003c\/li\u003e\n\u003cli\u003e3-flute spiral point geometry pushes chips forward, ideal for through-hole tapping\u003c\/li\u003e\n\u003cli\u003ePlug chamfer provides gradual lead-in for controlled thread cutting\u003c\/li\u003e\n\u003cli\u003e3% vanadium high-speed steel construction for wear resistance in stainless steel applications\u003c\/li\u003e\n\u003cli\u003eOxide coating reduces friction and improves chip flow at the cutting edge\u003c\/li\u003e\n\u003cli\u003eRight-hand thread direction, no coolant-through requirement\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for through-hole tapping of 4-40 threads in stainless steel and similar ferrous materials. Fits standard tap holders and tapping heads accepting 3.58 mm shank diameters.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eTapping should be performed by a qualified machinist using a properly aligned tap wrench, drill press, or CNC tapping cycle. Ensure the pilot hole is drilled to the correct diameter for a 4-40 thread before tapping. Use an appropriate cutting fluid for stainless steel to reduce heat buildup and extend tap life. Never force a tap that has stopped turning, as breakage in stainless steel is difficult to recover from.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 4-40\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChamfer\u003c\/strong\u003e: Plug\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClass of Fit\u003c\/strong\u003e: 2B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Vanadium High-Speed Steel (3% Vanadium)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Oxide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Application\u003c\/strong\u003e: Stainless Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 11.00 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 1.87 inches (47.60 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 3.58 mm\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: 0.08 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: ACCUPRO\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: T1620162B\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ACCUPRO","offers":[{"title":"Default Title","offer_id":51754425647410,"sku":"T1620162B","price":33.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/784f6c42d4e6dddfb5df4252b3fcfab8.jpg?v=1788945242","url":"https:\/\/voomisupply.com\/products\/accupro-t1620162b-spiral-point-tap-4-40-plug-2b","provider":"Voomi Supply","version":"1.0","type":"link"}