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 5990-01-389-1196
NSN 5905-01-443-6286
NSN 6130-01-146-3974
NSN 6145-00-378-3836
NSN 6650-01-171-0779
NSN 6220-01-572-3851
NSN 5950-01-166-5713
NSN 6105-01-290-4518
NSN 5999-00-595-5853
NSN 6620-00-970-2363
NSN 5950-01-628-4557
NSN 6110-01-540-3799