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 5960-00-040-9989
NSN 6320-01-486-8004
NSN 6685-00-819-4410
NSN 6650-01-502-2316
NSN 5915-01-483-6709
NSN 6135-00-951-3426
NSN 5855-01-241-1054
NSN 5999-01-272-5967
NSN 5935-00-216-7435
NSN 5920-01-605-2457
NSN 5915-00-323-1262
NSN 6110-01-004-9870