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 6645-01-239-8133
NSN 6610-00-164-1510
NSN 5935-01-422-2094
NSN 5945-00-189-8119
NSN 6105-00-246-7116
NSN 5975-01-590-9816
NSN 6610-01-130-8885
NSN 5999-01-549-9664
NSN 6105-01-170-4528
NSN 6685-01-657-2940
NSN 6130-01-292-8716
NSN 5835-01-534-3172