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 2925-01-453-1606
NSN 5930-01-018-7063
NSN 5905-01-477-7152
NSN 5950-01-089-7030
NSN 5895-01-364-9122
NSN 6685-00-270-5855
NSN 5975-01-242-9549
NSN 6150-01-305-9576
NSN 5996-01-579-1971
NSN 5855-00-427-7848
NSN 6685-01-262-2124
NSN 5895-00-111-1560