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 5910-01-416-5757
NSN 5965-01-204-8505
NSN 6110-01-629-5260
NSN 6685-01-609-3738
NSN 4140-00-164-6832
NSN 5990-00-140-1159
NSN 6145-01-583-8972
NSN 5965-00-422-5386
NSN 5930-01-542-9703
NSN 5925-00-644-5546
NSN 6685-01-252-9470
NSN 4140-01-224-6994