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 6320-00-270-8222
NSN 5998-01-190-4288
NSN 5930-01-449-1282
NSN 6645-00-664-4665
NSN 5855-01-054-9014
NSN 5915-00-241-3676
NSN 5945-01-126-4173
NSN 5935-01-532-9672
NSN 6320-01-088-1109
NSN 5855-01-529-7260
NSN 6685-01-180-0261
NSN 6610-00-141-7000