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 5945-00-030-2003
NSN 5998-01-566-2847
NSN 5996-01-457-6529
NSN 5930-00-124-5170
NSN 6135-00-812-9039
NSN 6110-00-382-5472
NSN 5855-01-437-6161
NSN 6130-00-387-2051
NSN 5990-01-651-6364
NSN 6685-01-038-4073
NSN 5925-01-152-1188
NSN 5965-00-400-6228