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 6685-01-412-3193
NSN 5930-00-128-6231
NSN 5915-01-102-1532
NSN 5965-01-598-1231
NSN 5998-01-476-5651
NSN 5985-00-144-8170
NSN 5960-00-798-0087
NSN 5999-00-232-8389
NSN 6620-01-488-9547
NSN 2925-00-373-8837
NSN 6620-01-432-7032
NSN 5996-01-583-2078