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 5935-00-201-2856
NSN 6145-01-183-2205
NSN 5920-01-437-8850
NSN 5930-01-299-9778
NSN 6110-01-541-2639
NSN 6150-00-039-9743
NSN 5945-01-501-4872
NSN 4140-01-300-1573
NSN 5935-01-012-4141
NSN 5996-01-167-9234
NSN 5975-01-272-3771
NSN 5998-00-097-9974