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 7035-00-849-5526
NSN 6320-00-593-0379
NSN 4140-00-580-7050
NSN 7035-01-098-5474
NSN 2925-00-939-1979
NSN 6240-01-046-9424
NSN 5965-01-007-1963
NSN 6645-00-230-4396
NSN 5930-01-654-1539
NSN 6150-01-261-0706
NSN 5965-01-429-0881
NSN 6240-01-454-1603