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 5990-01-503-9804
NSN 5945-00-282-3181
NSN 5895-01-198-7499
NSN 6650-01-633-9147
NSN 6145-01-014-2670
NSN 6150-00-518-2743
NSN 6220-00-051-4198
NSN 5950-01-509-0296
NSN 6220-01-151-3308
NSN 5905-01-113-7780
NSN 5998-01-522-3084
NSN 5985-01-326-6978