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 4140-01-236-6637
NSN 6320-01-276-4739
NSN 5950-00-290-8090
NSN 5996-00-033-7777
NSN 6105-01-563-5916
NSN 4140-01-443-4123
NSN 6130-00-959-5800
NSN 5990-00-057-6348
NSN 5990-00-362-1453
NSN 5998-01-373-5817
NSN 5910-01-302-8948
NSN 5998-01-063-8935