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 6145-01-545-2515
NSN 5910-01-235-7731
NSN 5920-00-683-7883
NSN 6650-01-471-6476
NSN 5960-01-461-1384
NSN 6150-00-913-4917
NSN 5925-01-203-2084
NSN 5998-01-147-6256
NSN 6105-01-513-8653
NSN 5895-00-788-9707
NSN 6220-00-386-0997
NSN 5960-01-632-6576