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 5960-00-173-4760
NSN 6130-01-418-1606
NSN 5985-00-155-0768
NSN 6320-01-544-6447
NSN 5990-01-199-4832
NSN 5998-00-227-3649
NSN 6685-00-155-4301
NSN 4140-00-081-6814
NSN 5910-01-435-4847
NSN 5965-01-592-3051
NSN 5990-00-827-0684
NSN 5975-00-343-9466