Driveshaft Coupler grub screw size

[Siw]

My Kyosho pureten/alpha is finally running again.
noticed one of the grub screws has fallen out during its test run. It holds is the piece that holds the driveshaft and connects to the differential.
looks like a small grub screw, but need to know the size before so I can order a replacement?

anyone know if they are a standard size? Or what size they are?

 

[WickedFog]

Most grubs are 3mm on 1/10 vehicles. It will be a standard metric, so if you have a known screw size to try in it, try and see if anything screws in there. As for the length, that is kinda easy to determine. You can use a toothpick and measure the depth with a scale ruler. Just get the closest size that is shorter than the depth measured.

I personally keep a stock of all standard size grubs snd screws. But I have a lot of RC's, 3d printers, and various other things that I use them for.