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 5985-01-105-8967
NSN 6620-00-967-3662
NSN 5960-01-093-6981
NSN 5945-01-655-5998
NSN 6650-01-436-3478
NSN 5999-00-999-4058
NSN 5920-01-473-4150
NSN 5905-01-103-7218
NSN 5905-01-411-5734
NSN 5945-01-095-0388
NSN 5985-00-452-2228
NSN 5985-01-465-2677