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 5996-01-050-6910
NSN 5960-01-019-0017
NSN 5895-01-373-2984
NSN 5990-01-643-4167
NSN 6220-01-206-4801
NSN 6610-01-655-1559
NSN 5985-01-076-3966
NSN 6110-01-361-4960
NSN 5945-00-626-9917
NSN 5990-00-991-8723
NSN 6610-01-633-8931
NSN 6650-01-564-3025