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 5930-01-169-6003
NSN 5945-00-310-1477
NSN 5935-00-917-9404
NSN 5998-00-234-7850
NSN 5855-01-352-7033
NSN 4140-01-362-2959
NSN 6135-00-484-8556
NSN 5910-00-300-4988
NSN 2925-00-157-1602
NSN 6650-01-648-1864
NSN 5920-01-336-9844
NSN 5945-01-630-7378