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 5996-01-602-5655
NSN 6145-01-439-2662
NSN 5925-01-355-6523
NSN 6240-01-633-9357
NSN 5835-01-656-2940
NSN 5915-00-456-0873
NSN 5915-01-067-8145
NSN 6610-00-960-9135
NSN 6320-01-319-3584
NSN 5975-00-156-0416
NSN 5925-01-460-3584
NSN 5996-00-276-5480