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 6145-00-635-9957
NSN 6110-01-302-5699
NSN 6105-00-007-5599
NSN 5975-01-190-3330
NSN 5925-00-594-0840
NSN 5935-01-466-9304
NSN 5990-01-517-7848
NSN 5960-01-291-3075
NSN 5960-01-257-0225
NSN 7035-01-443-3052
NSN 5945-00-175-4946
NSN 7035-01-375-3719