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 5905-00-012-3937
NSN 5960-01-471-4263
NSN 5975-00-936-7377
NSN 5999-01-231-3300
NSN 5930-01-249-3845
NSN 5975-00-028-0122
NSN 5910-01-389-8280
NSN 5965-01-640-7104
NSN 6240-01-421-4025
NSN 6130-01-525-4304
NSN 6610-00-081-2229
NSN 5950-01-644-9418