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 6130-00-893-4612
NSN 7035-00-902-8995
NSN 5996-01-355-8420
NSN 5998-01-604-8945
NSN 6150-00-927-3779
NSN 5915-01-194-2304
NSN 4140-01-076-8051
NSN 5960-01-218-2858
NSN 6110-00-766-0886
NSN 6130-00-805-1864
NSN 5990-00-882-4123
NSN 6650-01-512-1930