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 5965-01-423-4197
NSN 5975-01-101-3630
NSN 5985-00-064-2216
NSN 5965-01-500-1840
NSN 6105-01-512-8752
NSN 5975-01-388-2752
NSN 5915-01-426-1338
NSN 5975-00-404-7476
NSN 5895-01-086-1416
NSN 5930-01-527-2081
NSN 6130-00-155-5873
NSN 5930-00-430-6859