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 5945-01-621-3298
NSN 5855-01-512-1926
NSN 5960-01-531-9108
NSN 6320-01-225-9963
NSN 5910-00-654-5496
NSN 6645-01-457-6350
NSN 6150-01-418-2159
NSN 2925-00-373-8837
NSN 5999-00-934-8747
NSN 6685-01-406-3960
NSN 5996-01-435-7886
NSN 5915-01-046-4407