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 5910-01-037-8923
NSN 5910-01-401-5279
NSN 6150-00-061-3106
NSN 5915-00-909-8102
NSN 5920-01-059-2680
NSN 5835-01-381-2683
NSN 4140-01-199-3590
NSN 5915-01-330-0255
NSN 6145-01-109-9874
NSN 5965-00-888-2643
NSN 6105-00-710-4522
NSN 6620-00-942-1751