Underwater life support iaw navsea instruction 10560.2b
A item specifically designed to automatically/manually maintain outlet pressure in a divers helmet/breathing apparatus. It is designed for use with breathing gasses.
NSN 6135-01-142-2417
NSN 6105-01-308-8426
NSN 6110-00-489-2803
NSN 6110-00-784-7015
NSN 6610-01-536-2446
NSN 6220-01-271-5007
NSN 5950-00-112-7091
NSN 2925-01-487-0886
NSN 5999-00-857-4364
NSN 7035-00-946-2642
NSN 6220-01-518-6390
NSN 6135-01-393-4746