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 6240-01-325-8901
NSN 4140-00-069-5154
NSN 6145-01-241-0965
NSN 5835-01-034-2040
NSN 5990-00-683-1095
NSN 5915-00-264-5657
NSN 5960-01-025-9388
NSN 5998-01-106-4306
NSN 5945-01-471-0410
NSN 5910-01-147-3869
NSN 5915-00-451-4261
NSN 6105-00-919-4744