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 7035-01-606-5440
NSN 6220-01-213-1558
NSN 5996-01-621-7893
NSN 6150-01-415-4567
NSN 5895-00-203-2379
NSN 5985-01-295-0921
NSN 6130-01-109-6593
NSN 6620-01-063-6289
NSN 7035-01-407-6413
NSN 5915-00-078-9574
NSN 5960-00-265-0726
NSN 5998-01-304-9125