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 5985-01-613-7611
NSN 6650-01-491-9340
NSN 5965-00-208-4896
NSN 5855-01-049-5354
NSN 5905-01-246-9227
NSN 6240-01-124-5309
NSN 6130-01-285-3387
NSN 6650-01-112-6385
NSN 6650-01-110-0317
NSN 5930-01-597-7142
NSN 4140-01-454-7119
NSN 5960-01-495-0859