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 5910-01-453-8728
NSN 5965-00-407-4828
NSN 5945-01-598-4573
NSN 5998-01-102-1738
NSN 6620-01-401-5356
NSN 6620-01-361-8685
NSN 6105-01-474-9948
NSN 6130-01-435-8235
NSN 5999-00-482-3436
NSN 6105-01-629-6080
NSN 6620-00-400-4237
NSN 5945-01-444-2611