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 6150-01-020-9798
NSN 5999-01-165-0527
NSN 5905-00-417-0839
NSN 7035-01-196-3445
NSN 5960-01-126-5767
NSN 5835-01-512-4834
NSN 6240-00-158-2808
NSN 5855-00-548-4742
NSN 6685-01-613-6029
NSN 5990-00-929-0500
NSN 5930-00-383-1539
NSN 6105-00-286-5382