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 5915-01-078-5924
NSN 6645-01-480-3347
NSN 5999-00-616-2210
NSN 6320-01-185-3857
NSN 5998-01-379-1654
NSN 5998-01-413-2012
NSN 5905-00-955-3154
NSN 5920-01-467-8001
NSN 5990-01-129-7701
NSN 6135-00-016-0071
NSN 5960-01-429-5897
NSN 5855-00-688-9954