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 6130-00-593-4769
NSN 5930-00-308-2744
NSN 5999-01-658-0912
NSN 6620-01-281-6386
NSN 6145-01-447-8949
NSN 6220-01-493-5613
NSN 6105-01-222-6583
NSN 6150-00-941-3693
NSN 6610-00-195-7517
NSN 6110-01-221-1977
NSN 6240-00-325-2156
NSN 5960-00-552-9500