New Style (large) and Old Style (small) fire helmet D-rings. Sold individually and includes one semi-tubular brass rivet and washer for traditional installation with a rivet squeezer.
This can also be installed with a #6-32 machine screw with a thread length of ⅜" and a matching ⅜" hex nylon lock nut. INCOMPATIBLE WITH BEN 2 FIRE HELM...