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 5965-01-264-1738
NSN 5950-01-652-6410
NSN 5965-00-790-2441
NSN 5925-01-103-3024
NSN 5935-00-462-6618
NSN 6240-01-457-7978
NSN 6110-01-106-4440
NSN 5996-01-218-5678
NSN 5950-01-168-6535
NSN 6620-00-851-1487
NSN 5835-00-113-6090
NSN 4140-01-137-8505