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 6150-00-502-2692
NSN 6110-01-062-7269
NSN 5999-00-765-0866
NSN 5999-00-393-2811
NSN 5975-00-244-0706
NSN 5930-01-133-8879
NSN 6645-00-321-6071
NSN 5996-01-106-2763
NSN 5835-01-332-2867
NSN 6645-01-415-6039
NSN 7035-01-155-9025
NSN 4140-00-765-1155