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 6110-01-605-2037
NSN 5999-01-426-5313
NSN 5935-01-080-5810
NSN 5975-01-643-1711
NSN 5999-01-409-2834
NSN 6620-00-714-4307
NSN 5920-00-943-9763
NSN 5930-00-959-2879
NSN 6685-00-313-9239
NSN 5945-00-491-1230
NSN 6150-01-262-1883
NSN 6145-01-056-5515