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 5985-01-379-5646
NSN 5930-01-390-2182
NSN 5998-00-654-5278
NSN 5960-00-894-0043
NSN 5950-01-575-6992
NSN 7035-01-204-9851
NSN 6620-00-678-8777
NSN 5915-01-149-5595
NSN 6650-01-145-9570
NSN 6135-01-167-7604
NSN 6320-00-456-2092
NSN 6320-01-478-9351