HobbydexM3x21 button head screw, hex socket
- Category
- Screws
- Thread
- M3
- Length (mm)
- 21
- Head
- button
- Drive
- hex
- Modified
- 2026-10-27
- Standards
- ISO 7380-1
Branded parts matching this spec (1)
| Brand | Number | Name | Pack | Material | Match |
|---|---|---|---|---|---|
| Traxxas | 4978 | Screws, 3x21mm button-head machine (hex drive) (partially threaded, Revo® brake bolts) | 6 | functional |
Used in (via those parts)
| Year | Release | As part | Role |
|---|---|---|---|
| 2014 Jun | Traxxas Revo 3.3 (53097) | 4978 | listed |
| 2016 Aug | Traxxas Revo 3.3 RTR (53097-3) | 4978 | in the box |
| 2010 Jul 7 | Traxxas Slayer Pro 4X4 RTR (59076-3) | 4978 | in the box |
| 2014 Oct | Traxxas T-Maxx 3.3 (49077) | 4978 | listed |
| 2016 Aug | Traxxas T-Maxx 3.3 RTR (49077-3) | 4978 | in the box |
Derived by walking release, part and equivalence links; the material is a property of each branded part, not of the spec.
Data: m3x21-button-hex.toml on GitHub · report an error