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 6620-01-189-8153
NSN 5895-01-266-9983
NSN 5835-00-494-7204
NSN 5950-01-053-5095
NSN 6610-00-673-7317
NSN 7035-00-126-1899
NSN 5945-01-348-4428
NSN 5965-01-495-6305
NSN 5945-01-542-2187
NSN 5835-01-329-4814
NSN 5915-01-369-9561
NSN 5835-00-816-0394