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 5910-01-588-0767
NSN 5935-01-352-6927
NSN 5920-01-352-0880
NSN 5996-00-361-9901
NSN 5996-01-643-1776
NSN 6320-01-006-6138
NSN 5950-01-598-4359
NSN 5996-01-441-3360
NSN 5905-01-181-4699
NSN 5945-01-026-3947
NSN 5920-01-522-2759
NSN 5990-01-307-4489