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 4140-01-442-2435
NSN 5998-00-173-4127
NSN 6320-01-119-3935
NSN 5920-01-617-2718
NSN 6220-01-506-9654
NSN 5945-00-378-1284
NSN 5996-01-376-4552
NSN 6685-01-301-4835
NSN 6685-00-153-0266
NSN 5960-01-106-3086
NSN 5999-00-948-3176
NSN 2925-00-388-8932