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 5950-01-062-6912
NSN 6220-00-292-6775
NSN 4140-01-250-2600
NSN 5915-00-291-3736
NSN 5999-00-226-7859
NSN 6620-00-216-6416
NSN 5835-00-402-8387
NSN 5935-01-220-3054
NSN 5920-01-432-2428
NSN 4140-00-383-8230
NSN 5945-01-649-3349
NSN 5990-01-024-9659