Difference Between T20 And Tx20
Knowing where these screws live helps you buy the right bit before you start a project.
| Feature | T20 | TX20 (Tamper-Resistant) | | :--- | :--- | :--- | | Shape | 6-pointed star (Torx) | 6-pointed star (Torx) | | Center | Empty / solid floor | A raised metal pin | | 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
Quick Test: Look straight into the screw head. If you see a small post standing up in the middle, it’s TX20. If it’s a simple star-shaped hole, it’s T20. Knowing where these screws live helps you buy
| Feature | T2 (Form 2 / Legacy) | TX (Form 3+ / Current) | | :--- | :--- | :--- | | Technology | Standard SLA (Galvo) | LFS™ (Linear Galvo) | | Print Quality | Excellent | Superior (Smoother surface finish) | | Peeling Process | Rigid Peel (Higher Force) | Flexible Film (Low Force) | | Laser Maintenance | Factory Service Required | User-Swappable LPU | | Build Volume | 145 x 145 x 175 mm | 145 x 145 x 185 mm | | Best Use Case | Hobbyist & Basic Prototyping | End-Use Parts & Engineering | Official Engineering Ruling: Torx Plus and Standard Torx
Official Engineering Ruling: Torx Plus and Standard Torx are not interchangeable. You cannot "fudge" it with a smaller size. A T20 is not a "loose TX20." They are completely different engineering standards.
If you remember nothing else from this article, remember this:
A T20 (Torx) has sharp valleys and rounded lobes; a TX20 (Torx Plus) has flat valleys and square lobes. They are not interchangeable—using the wrong one strips the screw or breaks the bit. Always match the tool to the screw head geometry, not just the number.