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 5975-00-980-2443
NSN 5996-00-205-2933
NSN 5996-01-200-4128
NSN 6135-00-086-7530
NSN 6105-01-481-3763
NSN 6145-01-411-5895
NSN 5999-00-205-0918
NSN 5905-01-062-0805
NSN 6645-01-267-5505
NSN 5915-00-090-3478
NSN 6150-01-446-4733
NSN 6685-00-332-2655