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 5945-00-197-7673
NSN 5920-01-290-8050
NSN 6220-01-097-1212
NSN 5905-01-008-5287
NSN 4140-01-209-2668
NSN 6650-01-038-7198
NSN 5960-00-959-7413
NSN 5895-01-266-5544
NSN 6685-01-389-4130
NSN 6240-01-226-8097
NSN 6130-01-353-4901
NSN 5925-01-158-5008