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 5975-01-003-9803
NSN 5915-00-393-1850
NSN 5999-01-025-4518
NSN 6135-00-803-3012
NSN 6130-00-843-0929
NSN 6145-01-344-4268
NSN 5960-00-020-0074
NSN 4140-01-086-4799
NSN 5920-01-092-6839
NSN 5990-01-631-5537
NSN 5965-00-706-7005
NSN 5935-01-033-0057