Screw mesurements. Please help!

[mastiff1]

Hi

I was cleaning my bike and i saw that one of the screws is missing, so i need to get it, but i don know the mesurements, so can somebody give me the info i need in order to get it.
The bike is a 2005 ridgeback and the screw is the one that attached the coil to the frame.

Thanks!
Sam

 

[Splitlog]

Dont know the size but I carry a extra with me all the time..I have lost 2

 

[Chris04Masitff]

pretty common for that top mount bolt to get loose ... mine has loosened several times.. last time rode from chesterfield to clarksville (couple hours) parked bike and when i set it on kick stand it hit the ground... RED locktite and check it often is what i do...