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 5925-00-188-8678
NSN 6645-01-060-7988
NSN 5920-00-987-1605
NSN 5905-01-257-8105
NSN 6105-01-314-4076
NSN 5925-00-583-5370
NSN 6685-01-090-2671
NSN 5998-00-840-5463
NSN 6220-00-569-0970
NSN 5930-00-505-5306
NSN 5895-00-933-9923
NSN 5835-01-632-6627