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 6645-01-554-0609
NSN 5999-00-912-7555
NSN 7035-00-727-4068
NSN 5935-00-937-9401
NSN 6105-01-420-6541
NSN 5960-00-020-5196
NSN 5999-01-531-2945
NSN 5985-01-293-6571
NSN 5920-01-224-0355
NSN 5950-01-444-4298
NSN 5895-01-253-1770
NSN 5895-00-291-4873