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 2925-01-645-2948
NSN 5930-01-520-6418
NSN 5835-01-241-1090
NSN 5835-01-014-4574
NSN 2925-01-474-3363
NSN 2925-01-464-3093
NSN 5935-00-917-3954
NSN 5990-01-443-2931
NSN 6145-01-152-9462
NSN 6150-01-279-9669
NSN 5895-00-966-2784
NSN 2925-01-461-6372