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 6645-01-215-0617
NSN 5999-01-409-1098
NSN 5990-01-091-3567
NSN 5915-00-070-1850
NSN 6320-01-659-2819
NSN 5960-01-632-6576
NSN 6620-01-473-5163
NSN 6220-01-292-0980
NSN 6110-01-397-2077
NSN 5925-01-193-0171
NSN 6105-01-160-5533
NSN 5996-01-603-9740