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 5935-01-568-1879
NSN 6320-01-159-2211
NSN 6610-01-012-4081
NSN 6105-00-419-3174
NSN 6110-00-218-0967
NSN 6650-01-003-9355
NSN 5975-01-307-9826
NSN 6620-00-179-1884
NSN 6620-01-074-2882
NSN 6240-01-165-2693
NSN 5905-00-121-1848
NSN 5945-01-631-5431