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 5990-01-534-8609
NSN 6110-01-350-3449
NSN 5835-01-042-5315
NSN 7035-01-579-3587
NSN 4140-01-260-8009
NSN 6135-01-222-0703
NSN 6610-01-305-7927
NSN 5990-00-932-3070
NSN 5985-00-721-0255
NSN 5855-00-779-2854
NSN 5950-01-306-9639
NSN 5935-01-607-0883