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 5996-01-350-3345
NSN 5930-01-160-8427
NSN 5925-00-636-5683
NSN 5999-01-337-5261
NSN 5835-00-400-5056
NSN 5930-00-093-5867
NSN 6240-01-559-3806
NSN 4140-01-360-6744
NSN 6220-01-468-6030
NSN 6685-01-375-2841
NSN 5945-01-634-0588
NSN 5996-01-629-9093