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 6240-01-044-5049
NSN 6220-00-397-6910
NSN 5996-01-478-9147
NSN 5915-01-631-3238
NSN 6220-01-438-4662
NSN 5960-01-114-9646
NSN 6220-00-092-7758
NSN 5935-00-233-6198
NSN 6130-01-278-9831
NSN 5960-00-706-5439
NSN 5965-01-408-2624
NSN 5998-01-089-6409