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 5965-00-106-3195
NSN 6145-01-407-4786
NSN 5895-01-634-0630
NSN 6220-01-339-9973
NSN 5960-01-126-6245
NSN 5975-01-210-8885
NSN 5996-00-281-4500
NSN 5975-00-406-2742
NSN 5905-01-120-8858
NSN 5925-01-308-8548
NSN 6220-01-240-1108
NSN 5925-01-073-8951