Transport-Lock Screw for Thorens TD-318

Does anyone know where I can get a replacement Transport-Lock Screw for a Thorens TD-318? Or even where I can find out what size screw it was?

If I cannot find a replacement, how big a deal is it to transport the turntable without the transport-lock screw? I'm moving, and planning on having the turntable in the car with me, packed as well as I can for a 4-hour drive.

Thanks for your help,

I know this post is old but if anyone is looking for an answer. Flathead M4, .7 thread pitch, 60mm length is the correct replacement screw for the original transport screw on the TD-318mkI