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 5960-00-443-9452
NSN 5915-01-632-0539
NSN 6220-00-553-8938
NSN 5975-00-421-7504
NSN 6685-00-487-5071
NSN 5999-01-126-8705
NSN 5925-01-232-3928
NSN 6320-00-539-9283
NSN 5985-01-256-2547
NSN 6220-01-441-0508
NSN 5905-00-166-3844
NSN 5910-01-360-1447