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 5985-00-325-3997
NSN 5990-01-449-7090
NSN 5920-01-599-4432
NSN 5945-01-147-4484
NSN 5905-01-194-7949
NSN 5925-01-460-7920
NSN 6110-01-444-0763
NSN 6685-00-634-9964
NSN 5895-00-339-2044
NSN 5945-01-094-6343
NSN 5895-01-290-7874
NSN 6685-01-467-6174