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 5835-00-407-6820
NSN 5990-00-679-6157
NSN 6135-01-469-7574
NSN 6105-01-459-2149
NSN 6130-00-893-0847
NSN 6620-01-164-4913
NSN 5915-00-916-5188
NSN 6105-00-446-0068
NSN 5950-01-442-4515
NSN 6130-00-218-1363
NSN 2925-01-474-3363
NSN 5950-00-255-6264