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 5920-00-227-6586
NSN 5998-01-276-6891
NSN 5835-00-931-5568
NSN 5915-01-633-9845
NSN 6150-01-129-3506
NSN 5985-00-318-2539
NSN 5895-00-727-8708
NSN 6130-00-596-9565
NSN 5985-00-939-2481
NSN 5950-00-221-2538
NSN 6240-01-278-5342
NSN 6150-00-987-5809