Difference Between T20 And Tx20

A: TX20 is significantly stronger (approx 25-40% depending on the steel grade of the fastener).

If a screw head is labeled Torx or T20, use a T20 bit. If a screw head is labeled Torx Plus or TX20, use a TX20 bit. If the screw head is unlabeled, look at the valleys. Valleys are sharp = T20. Valleys are flat = TX20.

There is a clear trend in manufacturing: Torx Plus is slowly killing standard Torx.

However, standard Torx (T20) remains dominant in consumer goods because the tooling is cheaper and the torque requirements are lower. You do not need a TX20 to hold a hard drive in place.

Prediction: In 10 years, "T20" will be legacy tech, and "TX20" will be standard. But for now, you need to know the difference. difference between t20 and tx20

If you are standing in your garage right now with a screw that looks like a star:

One final warning: The most expensive repair jobs begin with the phrase, "It looks close enough." A stripped TX20 screw on a modern car's brake caliper can cost $400 in extraction and replacement parts. Buying the correct $5 TX20 bit is always cheaper than drilling out a stripped screw.

Analogy: Think of a standard flathead screwdriver vs. a flathead with a hole in the middle. The T20 is the standard; the TX20 is the "keyed" version.