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 5945-00-684-8160
NSN 5855-01-053-9684
NSN 4140-00-195-6230
NSN 6110-00-992-3789
NSN 5945-01-049-2016
NSN 5950-01-381-5245
NSN 5905-01-485-6382
NSN 5975-01-514-0043
NSN 6320-00-681-1324
NSN 4140-00-648-3303
NSN 5930-01-135-1716
NSN 4140-01-094-4571