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 4140-01-067-4317
NSN 5945-01-415-6049
NSN 5985-01-472-3278
NSN 5960-01-632-6576
NSN 5996-00-224-3526
NSN 6685-01-401-5360
NSN 5999-01-487-7646
NSN 6220-00-316-2500
NSN 5945-00-661-0506
NSN 5935-01-545-2332
NSN 6135-00-269-5843
NSN 5910-01-454-5646