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 5985-00-168-6245
NSN 6650-01-462-5879
NSN 6320-01-089-9086
NSN 6105-00-325-0956
NSN 6650-01-231-6728
NSN 6650-00-051-1395
NSN 5960-01-462-7704
NSN 6685-00-755-6917
NSN 5998-00-612-8502
NSN 5925-00-970-7364
NSN 5999-01-487-4515
NSN 6320-01-454-1965