Aceteel 4-40 Tap & #43 Drill Bit Set (Ti-Coated M2 HSS)

What people love (and don’t love)

What people love

Works well for drilling and tapping various materials including hardened steel and sheet metal.
Good quality set with sharp, durable drill bit and tap.
Convenient combo set that saves buying pieces separately.
Effective when used with tapping oil and patience.
Accurate drill bit size suitable for the intended tap.

What people don’t love

Some report the tap breaking easily and poor material quality.
The drill bit flutes may be uneven in some sets.
Not suitable for very heavy-duty applications requiring extreme strength.
Mixed experiences suggest inconsistency in product quality.

A solid choice for typical tapping jobs if used carefully, but quality may vary.

Summary based on customer review evidence.

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Quick facts

Brand: Aceteel
Price: USD 5.99
Rating: 4.20 (82 reviews)

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
#43 drill bit: 2.1 in (53mm) length, 2.3mm (0.09 in) cutting diameter, straight shank
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.