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 6145-01-253-0121
NSN 5945-01-021-4930
NSN 6105-00-436-1791
NSN 5895-01-394-5469
NSN 5895-01-181-8894
NSN 6105-01-400-1258
NSN 6620-01-605-2590
NSN 4140-00-162-6583
NSN 5895-01-304-1853
NSN 7035-01-217-3591
NSN 5920-01-559-2482
NSN 5960-00-869-1969