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 5855-01-057-2200
NSN 5905-01-367-8643
NSN 5965-01-378-6937
NSN 5950-01-238-4985
NSN 6320-01-521-1764
NSN 5998-00-952-2788
NSN 5920-01-113-8048
NSN 6110-01-127-9134
NSN 5935-01-341-3782
NSN 6105-01-386-9362
NSN 5920-00-930-9851
NSN 6650-01-485-1580