LOW AIR PRESSURE WARNING SWITCH FOR M939, M939A1, and M939A2. 24V DC, RATED FOR 5 AMPS, AND CLOSED CONTACTS OPEN AT 65 PSI. THERE ARE TWO OF THESE SWITCHES NEEDED ON YOUR M939 SERIES TRUCK.

# 11669414-1  NSN 5930011890494 OTHER NUMBERS INCLUDE SM-1A60RTP, PS4141, AND 12375453

WILL NOT WORK ON M35 SERIES TRUCKS. WE ALSO HAVE THE LOW AIR SWITCH FOR THE M35'S IN OUR STORE, LOOK FOR # 11621847