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 6135-01-582-5987
NSN 5915-01-197-1857
NSN 6645-01-100-3296
NSN 5945-01-397-1546
NSN 5945-00-104-8097
NSN 5996-01-084-6930
NSN 6110-01-550-3032
NSN 6135-01-303-0295
NSN 6650-01-212-3964
NSN 5930-01-535-8234
NSN 6610-00-553-5103
NSN 5915-00-248-5824