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 5920-01-334-2903
NSN 6135-01-523-3198
NSN 5990-01-581-5103
NSN 5925-00-726-0122
NSN 6645-01-312-3558
NSN 5990-01-432-4984
NSN 5935-00-986-7365
NSN 6110-01-390-7365
NSN 5975-00-143-4658
NSN 6105-01-206-1959
NSN 2925-00-363-9878
NSN 5960-00-878-9486