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 5960-01-116-6100
NSN 6240-01-216-4060
NSN 5930-00-428-1687
NSN 5996-01-057-1113
NSN 7035-00-938-8289
NSN 5855-01-167-2162
NSN 5925-00-789-3718
NSN 5998-01-649-4634
NSN 5999-01-280-1438
NSN 5915-00-334-3008
NSN 6610-01-420-1739
NSN 6645-01-564-5814