Looks to me the nipple(center) is a locator and the 2 threaded studs require nuts, either speednuts or all metal nuts.. I had a Traeger with a badge that had solid posts + used speed nuts. Being a fussy person who wanted to remove the badge for cleaning, I threaded the posts and used a lock washers and hex nuts..I had to be extremely careful to barely tighten the nuts as the soft metal badge posts could have been damaged by over tightening. I put a drop of cooking oil on the threads as a thread locker(dries sticky + hardens with heat). Bottom line, if you have no intention on removing the badge,for any reason, use speed or push nuts.
