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 6650-01-382-3216
NSN 6650-01-124-4314
NSN 5999-00-611-3621
NSN 5905-01-069-4466
NSN 6620-01-292-5072
NSN 6105-00-336-3323
NSN 5925-00-114-2253
NSN 5998-01-207-0778
NSN 5920-00-122-5278
NSN 6105-01-528-9027
NSN 5925-01-153-0144
NSN 2925-01-654-4621