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 5985-01-415-0274
NSN 6685-01-481-8859
NSN 5905-01-181-5745
NSN 5835-00-119-5585
NSN 5915-01-607-4773
NSN 6145-01-535-1448
NSN 5950-00-843-9461
NSN 6320-00-483-0451
NSN 5960-00-140-1727
NSN 5895-01-561-9566
NSN 2925-01-304-2127
NSN 5950-01-178-6306