Because T20 and TX20 share the exact same engineering blueprint, their physical measurements are identical. Measurement 3.86 mm (approx. 0.152 inches) Drive Shape 6-point hexalobular (star) Standard Screw Sizes Commonly used for #8 wood screws and M4/M4.5 machine screws
The distinction lies entirely in used by different tool manufacturers. Decoding the Labels: T vs. TX
| Feature | T20 | TX20 (Tamper-Resistant) | | :--- | :--- | :--- | | Shape | 6-pointed star (Torx) | 6-pointed star (Torx) | | Center | Empty / solid floor | | | Driver needed | Standard T20 bit | TX20 "Security" bit (hollow tip) | | Common color code | Tan or natural | Often Green or Red (manufacturer dependent) | difference between t20 and tx20
The key features of TX20 panels include:
In the past, some manufacturers may have used the "TX" prefix to avoid paying licensing fees or to differentiate their branded tools or screws, similar to a store brand version of a common product. Today, the distinction has largely disappeared, and "T" and "TX" are used interchangeably by most major brands. For example, companies like manufacture bits labeled as "TX20", while Milwaukee makes "TX20x150mm" bits, explicitly clarifying in the description that it's for a "Torx 20" screw. Bahco and Wiha are other examples where a product may be listed as a "T20" but have a specification of "TX20". Because T20 and TX20 share the exact same
TX20 is significantly stronger (approx 25-40% depending on the steel grade of the fastener).
Always check your bit labeling before you start turning. In the world of fasteners, assuming compatibility is the fastest route to a broken project. Invest in a proper Torx Plus set; your future self (and your stripped screws) will thank you. Decoding the Labels: T vs
Here is the direct answer:
However, if you are working on a modern vehicle (especially Ford, GM, or European makes) or high-end industrial machinery, you are likely looking at a . For these jobs, buy a dedicated Torx Plus (IP20) set. Attempting to use a standard T20 driver on a Torx Plus screw might get a loose screw out in a pinch, but it will inevitably ruin a tightly torqued fastener.
: The 0° drive angle of Torx Plus eliminates the radial forces that cause cam-out, the outward pressure that makes a driver bit slip. This protects the screw head from damage, reduces operator fatigue, and ensures a much more secure assembly.