Sole source required by statute 6.302
No other part numbers with same form, fit, and function found.
The portion of a mask, air line; mask, chemical-biological; mask, gas; or other breathing equipment mask that partially or completely encloses the user's face.
NSN 6645-01-598-3976
NSN 5915-01-429-8328
NSN 6110-01-281-7274
NSN 5835-00-888-9422
NSN 5835-01-235-9051
NSN 6320-01-344-6511
NSN 5855-01-081-4114
NSN 6135-00-377-9165
NSN 5975-01-394-4152
NSN 6135-01-365-2707
NSN 7035-00-235-3529
NSN 6135-01-513-2083