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 6145-01-459-8040
NSN 5920-01-475-0443
NSN 5945-01-200-3672
NSN 5960-00-824-5229
NSN 5998-01-623-5487
NSN 4140-01-394-6288
NSN 6610-01-209-5798
NSN 5935-01-582-2308
NSN 5855-01-093-8202
NSN 5915-01-414-6433
NSN 5965-01-653-5419
NSN 5965-01-398-9579