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 5998-01-140-0552
NSN 5910-00-333-4817
NSN 5905-01-100-1756
NSN 5998-01-301-7105
NSN 5965-01-262-1722
NSN 4140-01-421-3187
NSN 5915-00-084-3502
NSN 6650-01-166-0889
NSN 6105-00-112-5323
NSN 6620-01-464-3087
NSN 6240-01-188-1413
NSN 5975-01-229-8786