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 5975-01-486-6455
NSN 5965-00-127-1660
NSN 5960-00-549-3760
NSN 6135-00-900-2139
NSN 6130-01-188-4574
NSN 7035-01-062-1692
NSN 5930-01-515-8718
NSN 5925-00-201-7431
NSN 6240-00-865-7447
NSN 5920-00-339-0338
NSN 6610-00-680-8325
NSN 5855-01-424-7477