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 5930-01-506-9356
NSN 5975-01-610-7732
NSN 5975-01-614-7798
NSN 5910-01-334-1877
NSN 5950-01-179-9319
NSN 5935-01-294-5021
NSN 6610-00-946-6146
NSN 5855-01-606-9511
NSN 5998-01-527-1978
NSN 6650-01-615-0788
NSN 5855-01-569-8696
NSN 5855-01-108-2044