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 5920-00-232-3951
NSN 7035-00-946-2642
NSN 5950-00-783-1047
NSN 5920-01-009-1307
NSN 5835-01-435-4139
NSN 5930-00-992-1355
NSN 5945-01-415-5933
NSN 7035-00-111-4389
NSN 5945-00-615-9218
NSN 6105-01-391-5390
NSN 6220-01-250-4149
NSN 6650-01-599-5668