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 5930-01-366-0058
NSN 6610-00-139-1105
NSN 6105-01-271-4922
NSN 5998-01-100-0547
NSN 6105-01-091-3759
NSN 5920-01-544-1786
NSN 6645-01-250-8129
NSN 6220-00-894-7598
NSN 5920-01-605-4077
NSN 5990-01-604-0862
NSN 4140-00-182-9158
NSN 5999-00-090-7008