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 6685-01-356-3564
NSN 5960-01-446-1266
NSN 5999-01-268-7691
NSN 5960-01-371-5494
NSN 6620-01-132-9300
NSN 5965-00-823-8623
NSN 5895-00-205-2924
NSN 6220-01-399-8586
NSN 5965-00-226-0209
NSN 5975-00-428-1683
NSN 5930-01-076-9650
NSN 5950-01-075-0062