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 6610-01-440-0604
NSN 6610-01-599-4462
NSN 5905-01-364-9156
NSN 5895-00-615-6503
NSN 5915-01-012-7052
NSN 5950-01-551-1202
NSN 5975-01-633-1071
NSN 5895-01-422-5366
NSN 5935-01-079-3148
NSN 6105-00-847-8199
NSN 6145-00-705-6686
NSN 4140-01-037-6270