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 6240-00-067-1021
NSN 6130-00-146-9813
NSN 6105-00-466-9880
NSN 5960-01-628-2760
NSN 5835-00-572-7445
NSN 5905-00-540-6997
NSN 5945-01-028-3996
NSN 5965-00-253-1302
NSN 5990-01-232-6018
NSN 6685-00-258-2257
NSN 5996-00-135-5756
NSN 5905-01-644-8216