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 5985-00-202-1104
NSN 6685-00-959-7557
NSN 5950-00-533-7188
NSN 5945-00-846-3752
NSN 6645-01-606-7684
NSN 6610-00-137-6532
NSN 6320-01-629-0768
NSN 6240-01-262-2039
NSN 5895-01-518-8709
NSN 6105-00-018-0735
NSN 5999-01-643-6052
NSN 6105-01-486-8851