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 6320-01-116-3980
NSN 5975-01-156-0650
NSN 7035-01-461-5683
NSN 5835-00-059-5854
NSN 6150-00-377-8616
NSN 6240-01-394-5697
NSN 5960-01-392-6982
NSN 6135-00-567-1322
NSN 5999-00-469-1052
NSN 5950-00-721-2289
NSN 5975-01-456-3634
NSN 5998-01-356-7793