Would a 1/4-20 hanger bolt do what you want? It's a wood screw on one end and a 1/4-20 threaded bolt on the other end. The 1/4-20 threaded bolt would go into the tripod socket on most cameras.

http://www.boltdepot.com/images/cata...with-shank.gif

Should be very easy to find at a local hardware store.

Lee