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 6610-01-590-7222
NSN 6620-01-281-6386
NSN 5960-00-615-9972
NSN 5895-01-033-5444
NSN 6105-00-140-0920
NSN 5945-00-764-7039
NSN 5998-00-141-9872
NSN 5945-01-300-3759
NSN 5999-01-236-7676
NSN 6610-01-184-3016
NSN 5935-01-423-7014
NSN 5925-01-486-9617