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 5915-00-429-1986
NSN 6650-00-854-0265
NSN 5999-00-925-2502
NSN 5910-01-397-7172
NSN 5965-01-084-6921
NSN 5999-00-072-0045
NSN 6110-00-056-8133
NSN 5985-00-057-9326
NSN 5996-00-109-8172
NSN 5945-00-348-9242
NSN 6220-01-274-3545
NSN 6105-00-463-9108