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 6610-01-109-0391
NSN 6620-01-392-7191
NSN 5999-01-323-6942
NSN 6320-01-125-3361
NSN 5925-01-227-2356
NSN 6130-00-459-1024
NSN 5935-01-095-9760
NSN 5975-01-125-3333
NSN 5905-01-422-9484
NSN 6645-00-171-9639
NSN 6240-01-591-7953
NSN 6620-01-392-6180