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 6240-00-732-4240
NSN 5996-01-324-1827
NSN 6240-00-062-3642
NSN 5998-01-228-4635
NSN 6135-00-938-1351
NSN 5895-00-156-5948
NSN 5930-01-122-9588
NSN 5960-00-387-6268
NSN 5920-00-356-2103
NSN 5990-01-376-0405
NSN 6620-01-317-7849
NSN 2925-01-633-4048