apologies for the delay, here's a shot showing both sides of them:
http://www.brodie-tyrrell.org/crap/dsc18026_640.jpg
probably not something you'd want to use though because the gripping surface on the top is so small. if what you're mounting on there has a 3/8" thread I guess it's pretty heavy and needs the grip area of the hex plate. Let me know if you're still interested though.