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 6320-01-449-1014
NSN 5998-00-913-3469
NSN 5999-01-241-7938
NSN 5835-01-336-1153
NSN 5855-01-013-6864
NSN 5975-01-646-0874
NSN 6240-01-581-1930
NSN 2925-01-513-9114
NSN 5950-01-025-9376
NSN 6240-01-104-5693
NSN 6220-01-203-2096
NSN 2925-01-397-8028