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 5930-00-596-9276
NSN 6135-01-062-9356
NSN 6105-00-474-6969
NSN 5930-01-591-6935
NSN 5905-00-930-3204
NSN 5965-00-532-3284
NSN 5999-00-104-5582
NSN 5945-01-426-0833
NSN 6620-00-054-4778
NSN 5855-00-631-4565
NSN 6650-00-031-8467
NSN 5935-01-158-4176