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 5905-00-083-9515
NSN 5965-01-017-1451
NSN 6620-01-298-9194
NSN 6135-01-458-7476
NSN 5915-01-504-4280
NSN 5975-01-248-2083
NSN 2925-01-074-9102
NSN 6135-01-049-5980
NSN 6320-01-434-3049
NSN 5895-00-365-1188
NSN 5960-01-570-8605
NSN 7035-01-028-4966