On Oct 28, 9:23*pm, dave wrote:
thanks thirty-six,
*i wound up finding one. a mechanic friend of mine said "timeserts"
are better than helicoils, so i'll eventually fix the stripped one.

http://www.timesert.com/html/inchsert.html

You want 9/16" x 20 tpi for bicycle pedals, not the typical 9/16" UNF
which is 18tpi .