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 5945-00-835-2517
NSN 5999-01-529-3070
NSN 5985-01-602-6801
NSN 5998-01-508-3854
NSN 6110-00-489-2803
NSN 6685-01-597-2730
NSN 6240-00-943-4468
NSN 5930-00-582-1730
NSN 5835-00-240-9838
NSN 5990-01-432-4249
NSN 5998-01-398-9909
NSN 6130-01-147-7414