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 6150-01-227-8803
NSN 5975-00-928-9190
NSN 5835-00-104-2511
NSN 6320-00-937-5625
NSN 6685-01-119-7402
NSN 6150-00-152-1845
NSN 6685-00-253-9997
NSN 5920-00-962-3567
NSN 4140-00-731-8037
NSN 5960-00-781-4084
NSN 5975-01-299-6327
NSN 5985-01-188-8788