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 6110-00-374-4805
NSN 6145-00-809-6105
NSN 5985-01-576-9997
NSN 5905-01-375-4389
NSN 6220-01-007-6094
NSN 7035-01-088-6415
NSN 5905-00-531-9473
NSN 6220-01-164-7654
NSN 6105-01-361-9248
NSN 6105-01-387-8294
NSN 5855-00-782-7714
NSN 6220-01-191-7643