M3 hex standoffs 15 mm x 8
8 M3 hex spacers for boards stacked with room for headers, 15 mm tall. The hex flats take a wrench when the screw wants to spin. They print standing with 3 walls, which makes them solid at this diameter; the bore follows the DIN 273 medium clearance fit.

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Specifications
| Screw | M3, 3.4 mm clearance bore |
|---|---|
| Style | hex, takes a wrench |
| Height | 15 mm |
| Batch | 8 copies in one file |
Printing
- Prints standing, no supports; 3+ walls make the wall solid at these diameters.
- Hex flats take a wrench when the screw spins.
- Tall thin spacers: slow down the last centimetre or the top rings wobble.