Grub Screws, what sizes are the most popular with motor pulleys?

ESK8 Builds
1

What size grub screws are needed for a 16T 12mm motor pulleys?

2

M4 for me.

Andy.

3

M4. whats the length and width? im new to this stuff.

4

5mm long should be fine. An M4 threaded grub screw is 4mm in diameter.

Andy.

5

ok cool thanks.

6

I seen M3.M4 and M5 grub screws used in pulleys