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 5996-01-268-1625
NSN 6220-01-495-1433
NSN 5975-01-015-2697
NSN 5990-00-068-4324
NSN 5920-00-427-7267
NSN 5930-01-480-8864
NSN 5998-01-433-2308
NSN 4140-01-292-2249
NSN 6105-00-226-1828
NSN 5985-00-079-0598
NSN 6130-01-179-4593
NSN 5835-01-561-2959