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 5895-01-422-9839
NSN 5920-01-241-3227
NSN 6685-01-461-4054
NSN 4140-01-198-5652
NSN 5930-01-380-9701
NSN 6105-01-192-7702
NSN 6650-01-209-6318
NSN 5925-01-085-6444
NSN 6685-01-124-4362
NSN 5998-00-286-3590
NSN 5950-01-053-6595
NSN 6150-01-143-9033