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 5965-01-370-1891
NSN 6105-00-235-7982
NSN 5999-01-500-2638
NSN 5935-00-490-8618
NSN 5855-01-246-4274
NSN 5920-01-146-1290
NSN 6130-01-518-0699
NSN 5996-00-854-3311
NSN 6240-00-708-2083
NSN 5975-01-024-6960
NSN 5960-01-123-8775
NSN 6130-00-466-1679