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 5895-01-470-1108
NSN 5996-00-713-4013
NSN 5960-00-402-9390
NSN 5999-00-062-0218
NSN 5920-01-494-1442
NSN 5905-01-043-5677
NSN 5985-01-455-4489
NSN 5920-00-733-8468
NSN 6650-00-614-1711
NSN 5960-01-017-5449
NSN 6620-01-605-1465
NSN 5895-00-084-8887