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 5915-01-342-1678
NSN 6685-00-972-5886
NSN 5999-01-429-8560
NSN 2925-01-037-5383
NSN 6650-00-337-7464
NSN 5975-01-391-2744
NSN 5945-01-418-0419
NSN 6105-00-946-2959
NSN 6110-01-431-5770
NSN 6145-00-819-8117
NSN 5990-01-102-9617
NSN 6240-00-372-4841