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 5905-01-363-3152
NSN 6130-01-571-2261
NSN 5895-01-408-2955
NSN 5925-01-188-7630
NSN 5855-01-103-8650
NSN 6645-01-365-4091
NSN 6135-01-564-8390
NSN 5895-01-112-0532
NSN 5855-01-343-2933
NSN 5998-01-628-6627
NSN 6320-01-371-3047
NSN 6130-00-003-3561