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 4140-01-254-0435
NSN 5925-01-240-5007
NSN 5915-01-631-7940
NSN 6610-00-612-7379
NSN 6130-00-701-3999
NSN 5930-01-272-4360
NSN 5935-01-442-8689
NSN 5925-01-581-4662
NSN 5920-00-544-6564
NSN 6610-01-484-0676
NSN 5999-01-147-5782
NSN 7035-00-079-7189