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 5925-01-541-3101
NSN 6645-01-126-9030
NSN 4140-01-012-2460
NSN 5895-01-622-0719
NSN 6220-00-404-6921
NSN 5835-01-632-6627
NSN 5930-00-798-5446
NSN 5999-01-175-3561
NSN 5855-01-151-4233
NSN 5996-01-618-4515
NSN 6110-01-432-0758
NSN 6645-00-959-6502