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 6320-00-857-4073
NSN 6135-00-299-6918
NSN 2925-01-586-9280
NSN 6110-01-169-1854
NSN 5985-00-170-6768
NSN 5905-00-230-9635
NSN 5998-00-446-8830
NSN 6620-01-546-4942
NSN 5895-00-719-5413
NSN 6645-00-171-9639
NSN 6110-00-363-3974
NSN 6110-01-588-2730