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 5855-00-832-9341
NSN 5960-01-391-0643
NSN 5975-00-547-8911
NSN 6320-00-382-7825
NSN 6145-00-308-0247
NSN 5965-00-471-5018
NSN 6135-01-223-3869
NSN 5835-01-459-7428
NSN 5990-01-581-5103
NSN 5925-00-959-6075
NSN 2925-00-943-2263
NSN 6130-00-378-9889