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 6650-00-294-0881
NSN 5905-01-400-5968
NSN 6685-01-506-1860
NSN 6145-01-442-0199
NSN 5996-00-323-8215
NSN 6620-01-479-2352
NSN 5999-01-371-3000
NSN 5965-01-204-8505
NSN 5935-00-549-7469
NSN 6650-00-304-6987
NSN 5999-00-501-0703
NSN 5965-01-294-7522