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 6105-00-386-8565
NSN 6220-01-242-0345
NSN 6105-00-007-0424
NSN 5915-01-366-0031
NSN 4140-01-561-8011
NSN 5905-01-395-0093
NSN 5990-01-127-9294
NSN 5990-00-539-7859
NSN 6130-01-547-0520
NSN 5925-00-177-4654
NSN 5985-00-428-2046
NSN 5930-01-328-7899