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 6105-01-397-7806
NSN 5998-01-392-0057
NSN 6645-01-517-6960
NSN 5910-00-228-6091
NSN 6650-01-500-1756
NSN 5960-01-599-9821
NSN 6685-00-075-0669
NSN 5895-01-072-1319
NSN 5930-01-534-9495
NSN 5996-01-252-8275
NSN 5855-00-973-5717
NSN 6620-00-172-9222