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 5965-01-439-4493
NSN 5930-01-209-4530
NSN 5998-01-101-4733
NSN 5915-01-286-2834
NSN 5999-01-184-7421
NSN 5935-01-451-9773
NSN 4140-01-513-9139
NSN 6150-01-436-3692
NSN 5915-01-159-6026
NSN 5965-00-587-1916
NSN 5855-01-546-9423
NSN 5985-00-066-4546