I have a Outdoor Gourmet griddle would this fit?

This valve could fit on other grills that use clamp-on style grill valves. However, because it's not made exactly for your grill, I can't confirm it will work. It has a size 58 drilled orifice. You could order and see if it is the right piece to replace your original. If it's not the same, you can always return any unused parts to us within 30 days for a refund!