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 5950-01-090-0895
NSN 6220-00-248-5511
NSN 6110-01-415-3343
NSN 6105-01-386-1529
NSN 5835-00-419-0575
NSN 6110-00-260-0130
NSN 5985-01-336-5543
NSN 6650-01-231-2082
NSN 6610-01-529-8529
NSN 5835-00-339-3020
NSN 6650-01-237-4689
NSN 6650-00-075-4983