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 6645-00-067-7070
NSN 6650-01-533-7109
NSN 6135-00-574-1204
NSN 5915-01-061-9761
NSN 4140-01-325-8902
NSN 5895-00-785-1966
NSN 6105-01-377-6284
NSN 5910-00-580-4742
NSN 6150-00-657-4759
NSN 6645-01-240-5499
NSN 6685-01-599-3161
NSN 5835-01-080-7784