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 6135-01-370-9440
NSN 5935-01-454-9090
NSN 6110-01-538-8092
NSN 5965-01-432-9734
NSN 6650-01-660-8546
NSN 6130-00-317-3054
NSN 5920-01-358-3158
NSN 6240-01-269-8454
NSN 4140-01-020-6026
NSN 6685-01-266-7599
NSN 5965-00-255-3889
NSN 6620-00-269-5168