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 6135-01-090-5365
NSN 5835-01-502-9228
NSN 5950-00-576-3067
NSN 6110-01-102-2370
NSN 6645-00-991-8704
NSN 5855-01-160-3802
NSN 5905-00-490-0464
NSN 5855-01-364-9810
NSN 6645-01-091-9363
NSN 4140-00-361-4691
NSN 5855-01-297-7847
NSN 5950-00-734-8579