Drill America m20 x 1 High Speed Steel Plug Tap - Re-threads & Repairs

In this review the Drill America m20 x 1 High Speed Steel Plug Tap is evaluated for small-shop mechanics and hobbyists who need a reliable hand tap for re-threading or cutting new threads. The bottom line is that this single plug tap is best for through-hole work and general-purpose tapping because it is made from high speed steel and cuts sharply, offering clear thread form for common machine and hand-tapping tasks. It is a straightforward, uncoated tool that delivers good cutting performance and value when used within its limits.

Key Features

• Plug style: Designed for thru holes so it quickly establishes full threads without the longer lead of a taper tap.
• High speed steel construction: Provides a sharp cutting edge and general toughness suited to hand use or light machine tapping.
• Uncoated finish: The bare substrate gives broad compatibility with cutting fluids and avoids coating-related fit issues.
• Versatile use: Suitable for re-threading damaged threads and making new threads in a variety of common materials.
• Single-piece pack: Supplied as one plug tap, useful for projects that only need the thru-hole tap from a typical three-piece set.

Who It's For

The tap is aimed at home mechanics, fabricators, and machinists who frequently do general machine tapping or hand tapping and need a robust plug tap for thru holes. It is particularly useful for repairing or establishing standard metric threads where a single, sharp HSS plug tap is all that is required.

It is not intended for heavy production or hard abrasive materials where coated or specialty taps would last longer; users who need extreme durability or a full taper/plug/bottoming set should consider purchasing a complete tap set instead of a single plug tap.

Pros & Cons

Pros

• Sharp HSS cutting edge yields clean threads and good thread accuracy in common metals.
• Plug style is efficient for thru-hole threading and reduces the need for additional starter taps.
• Uncoated tool avoids compatibility issues and is easy to use with cutting fluid for smoother cuts.
• Simple single-item purchase for projects that only need a plug tap rather than a full set.

Cons

• Reports of durability issues under heavy load mean it can break if used aggressively or in hard materials.
• Single tap offering lacks the taper and bottoming taps some users prefer in a complete set.

Specifications

Product name	m20 x 1 High Speed Steel Plug Tap
Brand	Drill America
Material	High Speed Steel (HSS)
Style	Plug tap (thru holes)
Finish	Uncoated
Pack quantity	1 plug tap

Our Verdict

The Drill America m20 x 1 HSS plug tap is a sensible buy for hobbyists and small shops that need a sharp, general-purpose thru-hole tap at a modest cost. It cuts well and produces accurate threads in common materials, offering solid value when used appropriately, though those who expect heavy-duty longevity should consider coated or specialty taps or a full set.

Frequently Asked Questions

Can this tap be used by hand?
Yes, high speed steel hand taps are designed for hand use and can also be used under light power with proper alignment.

Is this tap coated?
No, this is an uncoated HSS tap, which is the base substrate without additional surface treatment.

Will it work for re-threading damaged holes?
Yes, the plug tap is commonly used to re-thread or repair threads, especially in thru holes, but care is needed to avoid breakage in hardened or brittle materials.