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 5920-00-861-6091
NSN 6220-01-470-0023
NSN 5910-01-272-0056
NSN 5990-01-314-0228
NSN 5960-00-468-5353
NSN 5905-00-584-8447
NSN 6645-01-261-0056
NSN 6150-01-170-5351
NSN 5895-01-431-7349
NSN 5999-00-331-9696
NSN 6645-01-540-7989
NSN 6220-00-734-0276