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 5835-00-126-2961
NSN 4140-01-582-2580
NSN 5965-01-420-2629
NSN 5910-01-408-5827
NSN 5975-01-095-4074
NSN 6620-01-022-1157
NSN 5920-01-267-6086
NSN 5960-01-305-5449
NSN 6130-00-409-9073
NSN 7035-00-337-8745
NSN 5920-00-513-4546
NSN 5910-01-285-4358