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 2925-01-250-2731
NSN 5985-01-621-7731
NSN 6105-01-431-8959
NSN 6150-01-104-9728
NSN 5895-00-028-6711
NSN 6150-01-513-9553
NSN 6620-01-317-7849
NSN 5920-01-647-1794
NSN 5945-00-278-9482
NSN 5945-01-491-5749
NSN 5999-00-229-8840
NSN 5935-01-100-3289