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 6150-01-460-3288
NSN 6130-00-405-2948
NSN 6685-01-568-9814
NSN 5950-00-889-9645
NSN 6130-00-452-1486
NSN 6145-01-653-4273
NSN 5945-00-894-8746
NSN 5975-01-316-4326
NSN 6220-01-431-7915
NSN 6685-01-445-4301
NSN 6650-01-457-0980
NSN 6105-01-030-2739