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 5990-01-268-6767
NSN 5996-00-421-8429
NSN 7035-00-679-9027
NSN 5930-01-486-9389
NSN 2925-01-524-6622
NSN 5935-01-263-5201
NSN 6220-01-091-9103
NSN 5965-01-077-3346
NSN 6610-01-506-4234
NSN 2925-01-087-4184
NSN 5985-01-605-3663
NSN 5930-01-547-6371