Can I put the burner head in the oven during self cleaning?
The self-clean temperature won't get high enough to melt the metal -- and the burner pieces are subject to pretty high heat anyway.  I have cleaned aluminum and enameled parts in a self-clean cycle and the only time I have had problems is with large surface-area part (think a frying pan or something) -- in this case you might warp the metal by subjecting it to such high heat.  I think the pieces you have will be just fin.