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 5935-01-266-1787
NSN 5935-01-069-3115
NSN 5990-01-102-9617
NSN 5915-01-157-9799
NSN 6610-01-498-0524
NSN 5915-01-298-1437
NSN 5895-01-350-3527
NSN 5975-00-794-8769
NSN 5920-01-317-9321
NSN 5895-01-654-4604
NSN 5910-00-379-2349
NSN 5910-00-104-8320