1989 Schwinn World workhorse, 1979 Trek Summer Bike, 1995 Schwinn Moab that never gets ridden
Depends if they came off a one piece or three piece crank. One piece will have 1/2" diameter thread, three piece will have 9/16". You want 9/16", unless you're running some strange cranks on your crosscheck.
I have BMX pedals on my Cross-Check too. Xpedo MX-3. Almost my favorite component on the whole bike - big and grippy, cool-looking. I also can't stand clips and straps or the goofy shoes, especially going through traffic to work.
i have the hamiltons on my bmx bike now... you 'll have no prob with them.... i beat mine up on a daily bases and they are still in top shape... i have DK pedals on my commuter just because of the pins are a little bigger and kinda give a stuck feeling kinda like clips...