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 5999-00-948-9249
NSN 5945-00-248-4873
NSN 5925-01-343-3596
NSN 2925-01-289-6448
NSN 5915-01-484-8869
NSN 5975-00-011-3714
NSN 5965-00-942-1602
NSN 5990-01-203-4075
NSN 4140-01-102-2244
NSN 5935-01-308-7866
NSN 6685-01-289-9709
NSN 6240-01-326-4139