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 5915-00-581-9979
NSN 5950-01-558-4072
NSN 6145-00-198-5675
NSN 5945-00-470-2884
NSN 6135-01-382-1980
NSN 6620-01-213-8772
NSN 5998-01-314-5147
NSN 5999-00-933-1768
NSN 5930-01-429-9864
NSN 5855-01-096-9294
NSN 5930-01-015-6375
NSN 5925-01-236-5570