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 5920-00-952-5360
NSN 5945-00-850-1977
NSN 5985-01-159-5159
NSN 5999-00-973-6223
NSN 5925-00-853-6198
NSN 6240-01-143-0397
NSN 5990-00-781-2575
NSN 6650-01-024-9554
NSN 5930-00-646-2140
NSN 6130-00-240-4765
NSN 5990-01-024-9659
NSN 5910-01-583-2403