Screws for body attachment, for 1/32 and 1/24 scale

[flywelder]

Hi, My questions are: what is the size of the screws, that have some times been used to attach bodies to the chassis of 1/32 and 1/24 scale slot cars. I have some older slot cars that need those screws, and I cannot find them for sale at my local hardware store. I suspect then I will have to find them on line, but I need to know what size to search for. By the way, if you know of a sources for these screws,would you share that info with me also?
Thank you!

[Bill from NH]

Flywelder, if you post this request on the HRW (Home Racing World) bbs too, you're apt to receive quicker answers.