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 5945-01-289-9407
NSN 5990-00-186-2445
NSN 6320-01-512-2031
NSN 2925-01-522-1134
NSN 5930-00-494-7776
NSN 6240-01-565-3840
NSN 5910-00-514-2038
NSN 6240-01-473-5873
NSN 6130-00-342-2416
NSN 5895-00-650-0376
NSN 5998-01-250-6257
NSN 5999-01-284-9185