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 5855-01-018-1247
NSN 5985-00-471-6077
NSN 6150-01-322-5953
NSN 6320-01-523-4954
NSN 5915-00-007-3813
NSN 5930-01-444-4074
NSN 5950-01-303-4816
NSN 5985-01-442-8381
NSN 5996-01-383-7018
NSN 5965-00-163-1791
NSN 6650-01-156-4660
NSN 6145-01-463-8229