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 5920-01-300-6055
NSN 5950-01-523-6047
NSN 2925-01-645-2948
NSN 6130-01-392-2198
NSN 5935-00-455-8672
NSN 5920-01-172-6358
NSN 6110-01-238-9160
NSN 5930-01-164-8647
NSN 5910-01-490-3366
NSN 5960-00-315-0358
NSN 5996-01-323-9370
NSN 5920-01-082-7497