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 5930-00-444-9544
NSN 5930-01-399-4436
NSN 6150-01-279-4878
NSN 6145-01-352-4503
NSN 5990-00-945-1782
NSN 6240-01-050-7537
NSN 5998-00-065-9996
NSN 7035-01-594-6986
NSN 5905-01-550-6826
NSN 5950-01-063-2464
NSN 6610-01-370-3886
NSN 5985-01-374-7756