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 6240-01-651-2850
NSN 6650-00-136-2262
NSN 4140-01-107-0222
NSN 7035-01-611-2610
NSN 4140-01-521-6900
NSN 5998-00-604-8785
NSN 6105-01-287-9756
NSN 6110-01-596-7719
NSN 4140-01-467-3620
NSN 6105-01-503-2576
NSN 6320-01-211-6578
NSN 4140-00-751-1694