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 5930-01-363-9996
NSN 6220-00-455-6306
NSN 6145-00-241-1770
NSN 5935-01-411-5474
NSN 2925-01-357-2512
NSN 5930-01-648-2582
NSN 5965-00-035-4556
NSN 5965-00-722-7574
NSN 6220-00-272-7497
NSN 5835-01-158-6878
NSN 5905-01-600-8908
NSN 6145-01-095-4139