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 5990-01-370-7912
NSN 5910-00-584-4614
NSN 5945-00-055-1770
NSN 5975-00-726-3565
NSN 6105-00-241-2213
NSN 5998-01-584-6235
NSN 5999-01-254-9500
NSN 6130-00-596-9565
NSN 5910-01-292-8214
NSN 7035-01-602-9350
NSN 5905-01-180-5539
NSN 5999-00-522-1078