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 6685-01-032-3384
NSN 5920-01-328-8944
NSN 6620-00-832-2556
NSN 6240-01-454-4392
NSN 5999-01-225-9869
NSN 6110-01-130-8038
NSN 7035-01-374-0005
NSN 5999-01-540-9910
NSN 6610-01-281-7536
NSN 5915-00-090-3741
NSN 5910-01-437-8609
NSN 5950-00-230-7421