[Cherryville Chuck]

Sears put out some stamped metal tables and they were router specific as the metal was countersunk so the mounting screws would be flush. Your router might fit one of those type tables as they were likely made by Ryobi and your model router was also made by Ryobi (315. serial numbers). If this one is a composite top then you can do what Stick said. You'll need a countersink drill bit to countersink the holes you drill so that they are flush or below the top surface.

 

[Cherryville Chuck]

Hi Slim and welcome. I’m not sure if the 315 model had metric screws but that model prefix means made by Ryobi so it’s a good chance. I don’t know about the US Home Depot stores but the ones in Canada sell metric screws. Take one of your old ones with you to match size and thread pitch.