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 5945-00-697-7257
NSN 5895-00-102-8738
NSN 5990-01-264-9759
NSN 5975-01-123-2147
NSN 6110-01-220-5888
NSN 5998-00-428-2617
NSN 5975-01-045-3705
NSN 5950-00-821-7838
NSN 6105-00-806-2695
NSN 6685-01-242-3415
NSN 6620-01-467-2111
NSN 6240-01-421-4025