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 5965-01-113-6654
NSN 5855-01-308-0955
NSN 5998-01-259-1148
NSN 5950-00-269-3054
NSN 5930-01-212-4066
NSN 6320-01-116-3980
NSN 5945-01-226-8640
NSN 6240-01-513-0306
NSN 5985-01-352-5696
NSN 5920-01-328-7911
NSN 6645-00-102-0015
NSN 6150-00-827-1949