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 6110-00-669-6726
NSN 5950-00-266-9058
NSN 2925-01-288-2091
NSN 5895-01-227-2651
NSN 6150-01-651-0896
NSN 6240-00-161-8099
NSN 6645-01-193-9839
NSN 4140-00-152-7092
NSN 5996-01-633-7979
NSN 5965-01-265-6814
NSN 5935-01-514-4488
NSN 6105-01-486-6112