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 6135-01-512-8740
NSN 6685-00-344-4603
NSN 6105-01-546-2330
NSN 5985-01-254-2623
NSN 6620-00-532-2068
NSN 5998-00-109-9691
NSN 5910-01-440-1230
NSN 5999-00-199-7626
NSN 6620-01-196-7670
NSN 4140-00-069-5154
NSN 2925-01-607-7754
NSN 6135-01-608-3470