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 5990-01-090-9312
NSN 5945-01-605-1480
NSN 2925-01-244-3016
NSN 5950-01-470-1866
NSN 5999-01-444-2091
NSN 6135-00-900-2139
NSN 6685-01-258-6212
NSN 5960-01-042-3337
NSN 6220-00-528-7752
NSN 6105-01-063-7704
NSN 5895-00-932-5491
NSN 5996-01-575-5349