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 6145-01-462-5714
NSN 5990-01-129-7701
NSN 5996-00-126-3153
NSN 5960-00-039-8533
NSN 4140-01-644-8606
NSN 6110-01-473-7088
NSN 5985-01-260-9482
NSN 5915-01-242-5002
NSN 5950-01-621-2907
NSN 6105-00-461-5962
NSN 6220-00-077-3162
NSN 6685-01-456-0130