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 6650-01-470-1315
NSN 5925-00-216-8767
NSN 2925-01-132-5827
NSN 5910-01-607-2721
NSN 6220-01-436-0429
NSN 6150-01-513-2036
NSN 6150-01-141-4998
NSN 5915-01-193-6298
NSN 5999-00-011-2468
NSN 5999-01-512-6028
NSN 6105-01-203-9963
NSN 2925-00-530-3673