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 5965-01-415-2898
NSN 5998-01-605-2569
NSN 6620-01-100-0431
NSN 5835-01-480-9215
NSN 6645-01-511-3272
NSN 6220-01-210-9900
NSN 6650-00-629-8027
NSN 6650-01-465-1081
NSN 6240-01-473-3781
NSN 5920-01-057-4990
NSN 2925-01-576-6206
NSN 5960-01-495-0859