1/2 x 1/2 Push-In x Female DOT Bulkhead UnionThe 1 2 x 1 2 Push In x Female DOT Bulkhead Union is a DOT approved and reliable fitting designed for connecting OD nylon air brake tubing to a female iron pipe thread through a bulkhead or panel. It is a push to connect design to ensure a secure and efficient connection. Built from brass for long lasting strength and corrosion resistance. Specification Details TYPE Push In x Female DOT Bulkhead Union DESIGN Push to connect and compact design (for