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 5990-01-468-1292
NSN 4140-01-080-8268
NSN 2925-01-224-1885
NSN 6685-00-209-4400
NSN 5960-00-246-4623
NSN 5930-00-431-8745
NSN 5930-00-316-2752
NSN 5905-00-360-5058
NSN 5999-00-923-5266
NSN 6685-00-156-3054
NSN 7035-01-146-7096
NSN 5960-01-215-0992