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 5905-00-379-4658
NSN 5950-01-299-4799
NSN 5965-00-698-0433
NSN 5835-01-314-2781
NSN 6320-00-025-9910
NSN 6240-01-194-2206
NSN 5935-00-584-7365
NSN 6145-01-443-7444
NSN 5905-01-406-8077
NSN 7035-00-320-5644
NSN 6135-01-597-1901
NSN 6150-01-199-0621