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 6685-01-572-7860
NSN 6220-01-461-2499
NSN 5835-01-012-5065
NSN 6110-01-540-8147
NSN 6150-01-080-1631
NSN 6650-00-684-3060
NSN 6135-00-010-5275
NSN 6685-01-101-8366
NSN 6220-01-551-1032
NSN 6650-00-559-1462
NSN 5975-01-059-9623
NSN 5998-00-526-9253