Skytee 2 M bolt size ???

[Telescope40]

Hello. Looking for help to see if anyone can confirm the "M" size for the adjustment bolts on a Skytee 2 mount as per the picture.  I've removed one of the bolts over the weekend and I'm sure a thread has stripped.  A couple of the bolts seem to be of different lengths too ? 

Trip to the diy.com store as soon as I know a size -  M3 / 4 Maybe ? 

Thanks in advance, as always.  John 

 

[Saganite]

Hi John,

M4 thread

 

Steve

[Telescope40]

Steve. Excellent and many thanks. 

John