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 4140-01-062-7244
NSN 5975-00-827-0261
NSN 5999-00-816-9670
NSN 5998-01-172-3610
NSN 6145-01-277-6894
NSN 5910-00-818-7557
NSN 5925-01-568-1100
NSN 2925-01-633-4048
NSN 5960-01-195-7590
NSN 5915-01-182-0421
NSN 5996-01-301-6113
NSN 6110-00-455-9881