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 5920-01-605-6946
NSN 6645-00-033-8714
NSN 5895-01-199-4252
NSN 7035-00-631-3782
NSN 5998-01-518-8524
NSN 6645-01-579-2898
NSN 6240-00-761-0980
NSN 5945-01-369-6515
NSN 6105-00-542-7948
NSN 5920-00-529-0618
NSN 6130-01-056-5251
NSN 5985-00-581-5802