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 5835-00-467-7294
NSN 5930-01-603-1179
NSN 5965-01-571-7958
NSN 6685-01-547-3484
NSN 5990-00-033-8128
NSN 6620-01-252-9626
NSN 5905-01-168-8793
NSN 5935-01-200-0573
NSN 6320-01-512-2031
NSN 6645-01-267-5505
NSN 5996-01-384-7431
NSN 6105-01-199-4265