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 6105-00-956-6357
NSN 6650-01-481-3618
NSN 5925-01-231-9509
NSN 5990-01-374-3877
NSN 6685-00-764-1137
NSN 5960-01-183-8213
NSN 6620-01-234-1799
NSN 6240-00-170-5302
NSN 5835-00-518-4507
NSN 5910-00-613-4507
NSN 5915-01-100-7062
NSN 6110-00-895-6034