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 6220-00-898-2010
NSN 5996-01-419-4215
NSN 6610-01-508-3125
NSN 5965-01-399-8454
NSN 7035-01-646-9747
NSN 6220-01-406-2051
NSN 6320-01-489-6044
NSN 6645-01-492-2808
NSN 5945-01-076-3211
NSN 6645-01-602-7028
NSN 5925-01-564-8576
NSN 5925-01-117-8170