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 5895-01-472-5822
NSN 6620-01-014-3219
NSN 6320-01-399-6177
NSN 5835-00-198-4936
NSN 5905-01-338-5506
NSN 5930-01-323-8599
NSN 6145-00-141-8095
NSN 6145-01-411-9054
NSN 5965-01-461-2850
NSN 5996-01-535-8047
NSN 6620-01-278-8028
NSN 6150-00-118-5591