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 6240-00-820-1705
NSN 5996-01-440-0634
NSN 5965-01-158-4187
NSN 6650-00-539-7298
NSN 2925-01-462-1620
NSN 5945-01-552-9641
NSN 6145-01-479-8135
NSN 5999-00-473-5597
NSN 5905-01-025-7455
NSN 5910-01-300-8930
NSN 2925-00-670-0638
NSN 6150-01-266-4011