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 6685-00-925-3288
NSN 6685-00-078-7539
NSN 5999-01-551-1661
NSN 5990-01-335-7948
NSN 6220-01-369-7017
NSN 5999-00-767-5736
NSN 6105-01-206-6434
NSN 6240-01-343-3022
NSN 6220-01-165-3635
NSN 6620-01-187-7267
NSN 5920-01-634-0250
NSN 5855-01-063-6340