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 6650-01-502-8629
NSN 5925-01-489-2791
NSN 5915-01-014-4837
NSN 5998-01-355-1412
NSN 5925-00-455-8584
NSN 6110-01-486-8235
NSN 5965-01-577-3827
NSN 5920-01-522-0649
NSN 5835-00-880-6477
NSN 6130-00-834-0142
NSN 6685-01-224-9410
NSN 6650-01-353-7809