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 6110-00-951-3026
NSN 6240-01-151-9341
NSN 6150-00-516-4223
NSN 6645-01-437-4860
NSN 5998-01-446-3664
NSN 5835-00-967-0998
NSN 7035-01-383-9357
NSN 4140-00-118-1816
NSN 5945-01-168-3828
NSN 6130-00-019-3032
NSN 6610-01-604-7335
NSN 5975-00-707-8036