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 5975-01-494-5845
NSN 5945-01-136-7910
NSN 5960-00-266-6741
NSN 5895-01-457-7886
NSN 6105-01-041-8698
NSN 6135-01-556-3352
NSN 6240-01-441-3606
NSN 5920-01-487-3700
NSN 5925-00-192-5930
NSN 5920-01-065-1824
NSN 5945-01-341-7090
NSN 6105-01-547-7612