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 5835-00-762-9675
NSN 5950-01-507-0604
NSN 5965-01-570-4711
NSN 5855-01-432-0524
NSN 4140-01-622-9389
NSN 5905-01-545-0585
NSN 5910-01-287-9194
NSN 6220-00-061-4140
NSN 2925-01-379-0903
NSN 6150-00-104-4572
NSN 5975-01-393-2968
NSN 6145-01-092-7023