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 5930-01-232-0132
NSN 6105-00-303-6802
NSN 6145-00-162-6230
NSN 5999-01-654-4730
NSN 6220-01-362-7997
NSN 6685-00-054-3956
NSN 6135-01-079-7852
NSN 6150-01-606-7856
NSN 5960-01-567-1096
NSN 6685-01-125-6687
NSN 5920-01-588-7898
NSN 6320-01-374-9924