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 6320-00-082-5868
NSN 5975-01-229-0868
NSN 6110-00-877-0255
NSN 5905-01-641-9211
NSN 6610-00-960-5711
NSN 6130-01-373-5184
NSN 5996-00-869-9997
NSN 5930-01-393-0211
NSN 5935-00-522-7923
NSN 4140-00-260-9521
NSN 5998-01-644-9463
NSN 5950-01-159-7995