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 5915-01-119-4090
NSN 6220-01-634-0660
NSN 5998-01-253-3259
NSN 5945-01-455-1364
NSN 6620-01-620-0930
NSN 6610-01-632-3364
NSN 6145-01-011-2266
NSN 5895-00-909-6072
NSN 5930-00-129-6675
NSN 5965-00-222-7394
NSN 5920-01-643-8942
NSN 5965-00-834-6298