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 5895-01-101-8921
NSN 5930-01-074-0885
NSN 4140-01-466-6002
NSN 6645-00-664-4665
NSN 5905-00-263-3453
NSN 5930-01-245-9487
NSN 5920-01-025-6989
NSN 5910-01-437-6881
NSN 6220-01-090-0044
NSN 6110-01-525-4270
NSN 6645-01-579-2898
NSN 6650-00-692-1541