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 5945-01-258-6395
NSN 4140-01-007-0590
NSN 5920-00-262-7558
NSN 7035-01-307-5366
NSN 6145-01-080-9295
NSN 5855-00-688-9954
NSN 5965-00-080-2045
NSN 6610-01-210-4306
NSN 5996-00-645-9957
NSN 5910-01-489-0966
NSN 6135-01-582-5987
NSN 5999-01-544-3416