These are used in air brake systems that are serviced by SAE J844 nylon tubing.
DOT applications require that the fittings be marked with DOT on them.
Air brake sleeve
Size 1/2″ tubing o.d.
Nylon air brake fitting Meets DOT FVSS571.106 air brake specifications. These are used in air brake systems that are serviced by SAE J844 nylon tubing. D