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 5895-00-459-8607
NSN 4140-01-589-7588
NSN 5835-00-949-3018
NSN 5999-00-727-1723
NSN 6240-00-789-3370
NSN 6650-01-317-2101
NSN 6150-01-654-8579
NSN 5996-00-392-7626
NSN 5960-01-076-4708
NSN 5930-01-548-1034
NSN 6645-00-394-8924
NSN 6220-01-281-3454