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 5910-01-552-8268
NSN 5960-01-423-1085
NSN 5920-00-263-0622
NSN 6135-00-932-3136
NSN 6650-01-266-5576
NSN 6150-01-358-7660
NSN 2925-01-058-1718
NSN 4140-00-111-3247
NSN 6650-00-379-5434
NSN 6105-01-332-9827
NSN 7035-01-058-1935
NSN 6130-00-254-8337