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 4140-00-274-9638
NSN 6320-00-422-9006
NSN 6240-01-180-3720
NSN 5990-01-559-0578
NSN 5920-01-065-1824
NSN 5905-01-355-6838
NSN 5945-01-417-3059
NSN 5925-00-549-5366
NSN 6650-01-384-1657
NSN 5835-01-124-8830
NSN 5910-00-597-4325
NSN 4140-01-146-5409