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 5999-00-637-9685
NSN 2925-00-124-5465
NSN 4140-01-371-8032
NSN 5925-01-411-6028
NSN 5965-00-421-9007
NSN 5910-01-124-9618
NSN 6685-01-308-3768
NSN 5925-01-225-0614
NSN 5999-01-583-0439
NSN 6320-01-046-5228
NSN 5975-01-211-3715
NSN 5960-00-856-5943