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 5835-00-902-8680
NSN 6150-01-268-4864
NSN 6685-01-474-6183
NSN 5950-00-816-9913
NSN 4140-00-269-7941
NSN 6320-00-098-2858
NSN 6685-01-501-5362
NSN 5920-00-617-9909
NSN 2925-01-185-9144
NSN 5985-01-379-1110
NSN 5950-01-410-2925
NSN 6650-00-925-1274