Used as a reusable exhalation port
NSN 5835-00-269-2232
NSN 5950-01-116-4480
NSN 5855-00-361-0167
NSN 6610-00-003-4986
NSN 5996-01-413-3353
NSN 6320-00-149-7570
NSN 5835-01-162-3042
NSN 6145-01-656-3903
NSN 5920-01-250-7449
NSN 5998-01-375-5162
NSN 5950-01-205-4898
NSN 5996-01-292-7056