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 6220-01-235-2353
NSN 6220-01-492-7046
NSN 5960-00-389-2915
NSN 6650-01-633-9147
NSN 6145-00-821-4418
NSN 6150-01-230-3041
NSN 6135-01-395-2388
NSN 6645-01-368-0399
NSN 5999-00-245-8219
NSN 5935-01-533-7867
NSN 5945-00-927-7675
NSN 5920-00-984-3554