Cage 4w594 calls item a "valve assist" while cage 06853 refers to item as "qri quick release"
A valve specifically designed for installation in an air brake system. It is used on trailers, long wheel base vehicles, as well as multiple rear axle vehicles. It serves to speed and synchronize the application and release of air operated service or parking brakes. It may include emergency features for trailer application.
Classification: Other taps, cocks, valves, etc., nesoi
NSN 5935-01-467-9084
NSN 5985-01-073-9101
NSN 6650-00-166-7160
NSN 5965-00-679-9501
NSN 2925-01-446-6523
NSN 5960-01-142-1995
NSN 5998-01-541-9045
NSN 5945-01-622-5111
NSN 5945-01-202-9666
NSN 5855-01-262-1766
NSN 6150-00-347-0520
NSN 5996-00-343-9341