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 6240-00-826-8426
NSN 5910-01-473-3779
NSN 6135-01-502-5787
NSN 5835-00-980-0468
NSN 5950-01-209-3752
NSN 5975-01-425-6496
NSN 5985-01-108-5352
NSN 6240-01-078-9490
NSN 6150-01-470-2349
NSN 5835-00-683-4612
NSN 6320-00-295-2854
NSN 5920-01-215-0497