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 5920-00-764-4061
NSN 5855-01-177-4751
NSN 6320-01-198-4024
NSN 5930-01-653-2576
NSN 5835-01-121-2098
NSN 5985-00-297-6583
NSN 6150-01-098-9609
NSN 6645-01-327-7362
NSN 6240-01-392-8868
NSN 6105-01-061-9001
NSN 6610-01-512-2025
NSN 5930-01-572-9336