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 5925-01-366-4222
NSN 6685-01-479-6021
NSN 6685-01-415-1619
NSN 5835-00-173-4456
NSN 5835-01-220-6024
NSN 5998-00-411-0516
NSN 6105-00-997-9085
NSN 5835-00-378-1429
NSN 5920-01-552-3298
NSN 4140-00-740-2153
NSN 6650-01-529-6721
NSN 5975-00-673-9869