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 5835-01-062-6258
NSN 5935-00-271-3205
NSN 5996-01-181-3825
NSN 6110-01-023-6765
NSN 6105-00-275-0826
NSN 5996-01-453-0752
NSN 5998-01-535-7086
NSN 5999-00-907-6627
NSN 6620-01-262-9489
NSN 5990-01-443-2931
NSN 6240-01-532-4211
NSN 5950-01-433-5888