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 5895-01-381-1976
NSN 5905-00-766-8329
NSN 5996-01-471-5506
NSN 5945-01-390-0637
NSN 6105-00-120-9601
NSN 5835-00-402-5607
NSN 5945-01-568-2132
NSN 6110-00-890-7727
NSN 5999-00-465-3681
NSN 5925-01-317-3869
NSN 5905-01-060-7100
NSN 5990-01-432-4249