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 6145-01-587-7689
NSN 5975-01-294-3474
NSN 5945-01-046-6319
NSN 5935-00-404-8521
NSN 6130-01-489-0429
NSN 6150-00-153-3196
NSN 5835-01-618-4122
NSN 6240-01-142-2963
NSN 5990-01-423-8189
NSN 4140-00-407-1326
NSN 5999-01-273-0151
NSN 5930-01-591-0435