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 6620-01-263-6697
NSN 5935-01-319-5223
NSN 6110-01-217-2331
NSN 5950-01-043-8980
NSN 6240-00-959-7025
NSN 6150-01-251-9543
NSN 6320-01-317-0926
NSN 5975-00-687-2196
NSN 5895-01-248-3480
NSN 6240-01-607-6252
NSN 5998-01-102-6390
NSN 5835-01-380-5943