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 5910-01-089-1976
NSN 6130-01-193-8992
NSN 5835-01-104-5707
NSN 5905-01-518-6700
NSN 5895-00-208-7581
NSN 6130-00-883-9333
NSN 6105-00-406-4930
NSN 6685-01-013-8915
NSN 6135-01-462-6040
NSN 5985-00-861-7896
NSN 4140-01-112-1729
NSN 5945-00-349-7701