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 6220-01-196-5969
NSN 5930-01-529-8186
NSN 5925-01-453-7479
NSN 6650-00-302-3707
NSN 5910-01-415-6256
NSN 5895-01-564-9929
NSN 5920-01-270-0615
NSN 5855-01-508-4654
NSN 5910-01-038-0673
NSN 5915-01-603-3152
NSN 7035-00-299-7150
NSN 7035-01-441-8363