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 6320-01-607-1491
NSN 6105-01-634-0322
NSN 2925-00-152-1825
NSN 5990-01-208-1101
NSN 6220-00-334-7008
NSN 6130-00-718-0860
NSN 6110-01-612-3507
NSN 5895-00-501-8174
NSN 5998-01-330-7933
NSN 5996-00-686-8818
NSN 5915-01-206-1208
NSN 5998-01-414-5789