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 5985-01-042-5729
NSN 5985-00-155-8754
NSN 5965-00-836-2690
NSN 6135-00-369-2368
NSN 5998-00-081-9929
NSN 5925-01-363-9925
NSN 5990-00-658-3953
NSN 5920-00-483-1597
NSN 5835-00-554-0399
NSN 5855-01-188-4049
NSN 5990-01-443-2931
NSN 6150-00-518-4558