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 5965-01-451-2481
NSN 5895-01-485-3952
NSN 6135-01-424-8130
NSN 5920-01-102-3248
NSN 5985-00-061-6024
NSN 6620-00-269-5168
NSN 6135-01-580-5726
NSN 6650-01-449-2334
NSN 6685-00-079-6427
NSN 5965-01-350-1890
NSN 5996-01-567-8559
NSN 4140-01-660-2737