Mark 2 replacement part, o-ring, niosh/msha, meets ansi/ul 913 standard for intrinsically safe apparatus
NSN 6240-01-429-2747
NSN 5935-00-045-4656
NSN 5950-00-560-0317
NSN 5835-01-381-2683
NSN 5895-01-634-0630
NSN 2925-01-629-9416
NSN 5965-00-015-7408
NSN 5950-00-450-3997
NSN 6145-01-575-5912
NSN 6220-00-834-2838
NSN 5975-00-157-9676
NSN 4140-01-271-1918