My fold down table on my boat has two contact fastners about the size of a quarter which holds the legs and table firm while it is in the stored position it apperas to be made out of plastic or hard nylon its black in color. there are numerous small pins on each side which interlockand hold the legs firm. Mine are orginal to the boat they have lost most of the teeth (pins) so they don't hold well anymore. Does anyone out there lknow what these things are called and if so where can you buy new ones?