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 5835-01-378-6804
NSN 5996-01-122-8288
NSN 5998-00-842-8132
NSN 6645-00-359-5463
NSN 4140-01-412-0794
NSN 5835-01-461-8184
NSN 5910-01-563-0057
NSN 6650-00-287-5868
NSN 5996-01-023-0537
NSN 5985-00-969-4628
NSN 2925-01-324-6423
NSN 4140-01-023-8098