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 5960-01-003-8480
NSN 5935-01-232-8785
NSN 5910-01-350-3639
NSN 5990-01-137-7848
NSN 6130-00-334-6590
NSN 5950-01-108-8554
NSN 6220-01-339-6342
NSN 5915-01-426-8862
NSN 4140-01-212-4312
NSN 2925-01-159-8312
NSN 5950-01-543-0877
NSN 5895-01-038-5781