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 5985-00-779-8276
NSN 6130-01-206-1048
NSN 5905-01-330-2738
NSN 5950-01-089-0732
NSN 5999-00-606-8244
NSN 5998-01-359-2884
NSN 5895-00-932-5491
NSN 5996-01-526-6120
NSN 5998-01-202-8949
NSN 6610-01-031-7248
NSN 5835-01-384-3206
NSN 5855-01-461-2741