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 5990-01-081-3845
NSN 5895-00-057-1926
NSN 5999-01-528-8043
NSN 6105-01-634-0322
NSN 5835-01-479-7908
NSN 5910-01-331-6436
NSN 5895-01-557-0090
NSN 4140-00-009-3586
NSN 5998-01-253-7043
NSN 6240-00-456-6238
NSN 5985-00-896-9632
NSN 7035-01-512-1826