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 7035-01-423-8343
NSN 6240-01-388-1739
NSN 6650-01-155-8182
NSN 5950-00-964-8678
NSN 5999-00-837-9496
NSN 6220-01-117-2918
NSN 5975-00-473-7859
NSN 5925-01-451-0518
NSN 5999-01-568-1758
NSN 5925-01-591-0307
NSN 5930-01-345-2966
NSN 6135-01-305-6958