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 5985-01-586-8746
NSN 6645-00-300-0401
NSN 5965-01-394-8917
NSN 5855-00-198-3197
NSN 5998-01-388-4203
NSN 4140-01-556-7426
NSN 5985-01-601-6032
NSN 2925-00-449-2478
NSN 5996-00-468-1874
NSN 5965-01-041-8139
NSN 5998-00-616-7718
NSN 5985-00-005-3334