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 5960-01-085-7191
NSN 5960-01-054-3752
NSN 6320-01-006-6138
NSN 5975-01-646-2369
NSN 6240-01-587-0923
NSN 5895-01-634-0630
NSN 5985-01-157-9826
NSN 6220-00-909-0711
NSN 6685-00-446-2692
NSN 6110-01-550-9762
NSN 6320-00-343-1798
NSN 6130-00-186-8460