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 6650-00-925-7253
NSN 5930-01-382-9798
NSN 5945-00-100-5770
NSN 5905-00-687-2121
NSN 5915-01-660-9660
NSN 6110-01-054-3032
NSN 5960-01-546-2379
NSN 6240-01-367-6561
NSN 5998-01-540-1749
NSN 6610-01-422-1322
NSN 5999-00-253-2192
NSN 5975-01-492-6386