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 7035-01-363-2748
NSN 6240-00-389-4822
NSN 5930-00-428-1687
NSN 5895-01-034-6921
NSN 6130-00-681-1496
NSN 5895-00-247-7394
NSN 6110-00-493-7435
NSN 5990-01-522-6096
NSN 5996-00-382-3597
NSN 5915-01-332-5739
NSN 5910-01-055-2019
NSN 6110-00-231-3751