New led build bolting to 20/20 profile

I was looking at the 20/20 aluminium profile and thinking of using it for my next frame and mounting f series on just the ends to the profile and leaving the rest of the strip exposed just to air.

I noticed the f series strips I’m using have just semi circles cut out on sides for bolting

what kind of nut can I use with my 20/20 profile T bolts so the nut doesn’t overlap the led diode when screwing down? It would need to be extremely small wouldn’t it?
Cheers

Stoner moment don’t need this post. Was looking at male T nuts rather than female.

if I go with female I can then use any bolt - specifically small button head bolts straight through strip.