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 5930-01-168-2355
NSN 5895-00-837-3441
NSN 6150-00-058-6629
NSN 6645-00-998-7820
NSN 6150-01-276-4327
NSN 5996-01-391-7489
NSN 6110-01-209-9136
NSN 6320-01-262-8642
NSN 4140-00-307-2732
NSN 5835-00-198-4936
NSN 6650-00-052-3202
NSN 5985-01-559-7306