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 5855-01-521-1922
NSN 4140-00-249-5603
NSN 6650-01-061-9101
NSN 5999-01-237-1593
NSN 5930-01-037-5934
NSN 5950-00-758-7508
NSN 6240-00-514-3507
NSN 5996-00-489-9635
NSN 6105-00-993-5244
NSN 5999-00-147-7467
NSN 5920-01-014-0611
NSN 5935-01-191-0165