BMX threaded pegs without bolts
 

Hello,
I'm new to bmx riding and have a question.
Got myself threaded pegs and wondered if I can tighten them without the bolts because I don't have the wrench with the extension. It seems to hold on nice but is it good to for the bike without damaging it and can I ride them

Most threaded pegs are tightened with a screwdriver through a pair of holes for that express reason. Some have machined flats for turning with a wrench.

It's not terribly clear what you have, since you mention using nuts to hold them on...

Nope , pegs tubular here .. uses the axle nut to hold it socket wrench with an extension
is how we, in the Shop, deal with those ..

selling plastic ones & Pedals to ride the skateboard bowl ..