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 6685-01-513-9208
NSN 5999-01-003-6597
NSN 5930-01-014-4406
NSN 5930-00-489-7662
NSN 5998-01-091-9359
NSN 6105-01-058-8731
NSN 5920-01-433-9119
NSN 5999-00-289-1472
NSN 6685-01-443-3284
NSN 5945-00-161-4014
NSN 6145-01-192-2087
NSN 6220-01-398-4111