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 6145-01-117-7465
NSN 7035-01-271-1643
NSN 5920-01-081-1096
NSN 5945-00-945-9948
NSN 5895-01-118-7652
NSN 5996-00-159-8096
NSN 5935-00-308-0770
NSN 6135-01-122-4448
NSN 5975-01-428-7278
NSN 6145-00-153-2818
NSN 7035-00-299-7150
NSN 5915-01-296-8974