A relatively thin metallic item, having a concave or cupped contour, designed to effect its own seal by compression against the circumference of a hole. It is used as a blowout plug in boilers, engines, and the like to relieve the pressure created by the expansion of fluids caused by heat or freezing.
Classification: Parts for steam or other vapor generating boilers and super-heated water boilers, except heat exchangers
NSN 5950-01-378-7042
NSN 5895-01-178-4061
NSN 5935-00-725-6111
NSN 4140-01-308-6650
NSN 5950-01-268-7827
NSN 6135-01-388-2761
NSN 5935-01-218-9851
NSN 5935-01-042-5606
NSN 5985-00-935-5074
NSN 5895-01-196-6312
NSN 6105-01-074-7904
NSN 5965-01-202-1007