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 6220-01-218-0847
NSN 5985-00-942-4918
NSN 5960-00-227-0243
NSN 6620-01-294-1044
NSN 6130-01-073-1201
NSN 6685-00-720-3525
NSN 6135-00-161-0746
NSN 5999-01-400-2606
NSN 6105-01-388-1926
NSN 5990-01-146-1779
NSN 4140-01-290-8697
NSN 5855-01-069-4126