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 6220-00-339-2756
NSN 5925-00-306-2837
NSN 5999-00-598-6055
NSN 6110-01-463-5624
NSN 5835-01-495-0595
NSN 5915-01-182-3037
NSN 5920-00-397-2212
NSN 4140-01-095-4149
NSN 5996-01-204-0675
NSN 2925-00-422-5159
NSN 5990-01-093-0836
NSN 5960-01-154-3719