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 5985-01-260-0306
NSN 7035-01-361-8821
NSN 5915-01-236-7586
NSN 5996-01-143-2583
NSN 6135-01-400-2947
NSN 5935-01-012-1850
NSN 5965-00-564-4399
NSN 5835-01-326-6104
NSN 5996-00-443-1663
NSN 6650-00-344-9500
NSN 5990-00-452-9194
NSN 5930-01-145-4520