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 6220-00-244-2040
NSN 5996-00-034-4779
NSN 5930-01-236-7463
NSN 5855-01-175-3990
NSN 5965-01-546-8660
NSN 5990-01-009-1422
NSN 6145-01-152-9013
NSN 6620-00-346-0583
NSN 6240-01-084-6686
NSN 4140-01-213-2910
NSN 5920-00-610-3209
NSN 6220-01-428-8944