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 5975-00-394-2545
NSN 6650-01-278-6645
NSN 5996-00-392-7626
NSN 6610-00-445-5695
NSN 6240-01-064-0949
NSN 5935-00-965-7837
NSN 6220-01-204-8916
NSN 5985-01-077-3337
NSN 6105-01-188-5051
NSN 6110-00-343-1618
NSN 6620-00-911-4270
NSN 4140-00-139-3396