Mark 2 replacement part, niosh/msha, meets ansi/ul 913 standard for intrinsically safe apparatus
NSN 5915-00-651-9568
NSN 5915-01-628-7725
NSN 4140-01-441-9170
NSN 6135-00-583-3966
NSN 6645-01-123-9277
NSN 4140-01-075-5455
NSN 5998-01-146-5685
NSN 5895-00-172-6256
NSN 6145-00-862-7069
NSN 6650-01-487-6274
NSN 5895-00-280-7528
NSN 5905-01-202-8489