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 6220-01-468-8897
NSN 6650-01-430-9416
NSN 4140-00-466-9268
NSN 6320-01-449-1014
NSN 5999-00-199-5285
NSN 5835-01-426-6573
NSN 5945-01-449-2594
NSN 5990-01-478-8638
NSN 5985-01-415-9208
NSN 2925-00-185-1618
NSN 6105-01-253-9517
NSN 5915-00-794-9148