If you’re chasing clean #4-40 threads without piecing together separate bits, the Aceteel 4-40 Tap and #43 Drill Bit Set keeps it simple. You get a Ti-coated M2 high-speed steel (#4-40 UNC) tap plus a matching #43 (2.3mm / 0.09″) drill bit—handy for small hardware projects, repairs, and light fabrication work.
You can view the current price and full details on Amazon here.
The titanium coating is designed to improve wear resistance and help extend tool life. The straight-handle drill bit and compact tap dimensions also make it easy to store as a go-to setup for #4-40 threading tasks.
Includes 1pc #4-40 Ti-coated tap and 1pc #43 Ti-coated drill bit (2-piece set)
#4-40 UNC tap: 1.97 in (50mm) length, 40 TPI, 3.0mm shank, 2.5mm x 2.5mm square head
M2 HSS construction with Ti-coated finish for wear resistance
Suitable for many metals including aluminum, brass, copper, cast iron, alloy steel, and iron plate
Tip: As with most tapping jobs, using appropriate cutting fluid and backing the tap out periodically to clear chips can help improve results and reduce breakage—especially in harder metals.
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