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 5998-01-220-9671
NSN 5998-00-114-5269
NSN 6130-00-233-6427
NSN 6220-01-381-1793
NSN 5965-01-322-8136
NSN 5960-01-469-5874
NSN 6320-00-115-0883
NSN 5950-01-268-1813
NSN 6620-01-204-4640
NSN 5895-01-092-6373
NSN 6145-01-258-6673
NSN 5895-01-063-7400