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 6685-00-100-4390
NSN 5998-00-450-5447
NSN 5930-01-485-3834
NSN 6240-01-420-6495
NSN 6645-01-263-3621
NSN 5975-01-616-2938
NSN 6220-01-092-5177
NSN 5915-01-314-8157
NSN 6610-01-348-0545
NSN 5999-00-606-8922
NSN 6685-01-011-4859
NSN 5960-00-081-1937