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 5920-00-040-2923
NSN 5975-00-483-4979
NSN 5950-01-444-4588
NSN 4140-01-172-4035
NSN 5915-01-476-7124
NSN 2925-01-448-2880
NSN 5950-01-468-5431
NSN 5915-01-062-7270
NSN 4140-00-547-8918
NSN 5950-01-592-2121
NSN 7035-01-472-1999
NSN 6105-01-023-0323