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 5999-01-508-2928
NSN 5910-01-324-1567
NSN 6110-01-438-7439
NSN 5960-01-328-1533
NSN 6240-01-032-2408
NSN 5985-01-238-6944
NSN 6145-01-621-4388
NSN 6650-00-486-7924
NSN 5905-00-195-7506
NSN 4140-01-417-2611
NSN 5996-00-085-7826
NSN 5985-01-387-8880