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 6240-00-531-3187
NSN 5905-01-412-0231
NSN 5920-01-508-9004
NSN 5965-01-605-1753
NSN 5910-01-290-6625
NSN 6620-01-157-9267
NSN 5915-01-384-2642
NSN 6240-01-216-4060
NSN 6110-01-323-3408
NSN 5935-01-012-8593
NSN 5996-01-415-3098
NSN 6650-00-518-5194