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 5975-01-325-9204
NSN 7035-01-204-5092
NSN 5920-01-439-3790
NSN 5945-00-248-6798
NSN 5985-00-488-0817
NSN 5895-01-117-1854
NSN 6320-01-183-8196
NSN 5935-00-084-4213
NSN 6130-00-826-8284
NSN 5910-00-030-6548
NSN 5996-01-394-3378
NSN 5945-01-410-7778