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 2925-00-064-6629
NSN 5935-01-099-2690
NSN 4140-00-269-3189
NSN 5965-01-650-9660
NSN 6220-00-923-2660
NSN 5920-01-389-1768
NSN 6320-00-284-1524
NSN 5920-01-582-7623
NSN 5895-01-169-5302
NSN 6620-01-029-3705
NSN 5998-00-378-4096
NSN 5996-00-026-9118