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 6650-01-624-5411
NSN 6105-01-085-5617
NSN 5905-01-070-1328
NSN 6320-00-937-5625
NSN 5998-01-192-2420
NSN 6105-00-990-3592
NSN 5895-00-677-1982
NSN 5999-00-440-0237
NSN 5835-00-280-8494
NSN 6685-00-180-0349
NSN 4140-00-016-2615
NSN 5920-01-400-0791