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 5905-01-170-8291
NSN 4140-01-502-8993
NSN 5920-00-913-0475
NSN 6105-01-485-6976
NSN 5910-01-291-3492
NSN 6610-01-354-7963
NSN 7035-00-908-4933
NSN 5835-01-525-3220
NSN 5935-01-497-1913
NSN 4140-00-935-5360
NSN 6145-01-149-2964
NSN 2925-00-542-8285