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 6110-01-003-3173
NSN 6320-01-090-8296
NSN 6130-01-463-7402
NSN 6110-01-186-0406
NSN 6220-01-217-6627
NSN 5935-01-528-8091
NSN 5960-01-391-4701
NSN 6150-01-025-1299
NSN 5935-00-430-8953
NSN 6645-01-619-2756
NSN 5945-01-173-8389
NSN 5930-01-026-8862