I'm assuming, from the pic, you stripped the hex opening, not the threads. A couple of options:
1) see if a standard sized allen wrench will fit, and try lightly tapping it into the hex opening. If you have a grinder, you can "sacrifice" a larger allen wrench by grinding a tapper in the end to get to fit.
2) Sears, Home Depot, Lowe's Ace Hardware, will all have "EZ-outs" You may have to grind the end down to get it to tightly fit into the hex opening.
Don't grind too much too fast off the tool, it'll get hot and loose it's hardness. Cool the part often in water when grinding.
1) see if a standard sized allen wrench will fit, and try lightly tapping it into the hex opening. If you have a grinder, you can "sacrifice" a larger allen wrench by grinding a tapper in the end to get to fit.
2) Sears, Home Depot, Lowe's Ace Hardware, will all have "EZ-outs" You may have to grind the end down to get it to tightly fit into the hex opening.
Don't grind too much too fast off the tool, it'll get hot and loose it's hardness. Cool the part often in water when grinding.
