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 5965-01-332-1931
NSN 5910-01-381-5624
NSN 5950-01-355-8861
NSN 5975-00-985-6630
NSN 6320-01-278-9832
NSN 5935-00-835-4691
NSN 5990-01-443-2931
NSN 6145-00-338-5645
NSN 5915-00-845-3717
NSN 5999-01-650-2643
NSN 6240-01-648-0661
NSN 6650-01-014-7671