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 5965-01-040-4178
NSN 5930-01-067-4927
NSN 5935-01-599-8209
NSN 5930-01-574-1726
NSN 5855-01-173-0808
NSN 6240-01-592-3176
NSN 5855-00-962-5792
NSN 6105-01-587-7638
NSN 5945-01-474-5583
NSN 4140-00-078-9357
NSN 5945-01-338-6483
NSN 6620-01-509-5674