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 6240-00-428-4027
NSN 5935-01-216-5786
NSN 6620-01-575-9561
NSN 5945-01-649-7977
NSN 6645-00-359-5463
NSN 6105-00-519-0941
NSN 5855-01-388-6837
NSN 5935-01-374-6709
NSN 5935-00-377-9429
NSN 5965-01-441-1525
NSN 5855-00-403-1031
NSN 6150-00-189-0292