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 6135-01-142-5760
NSN 5915-01-065-1127
NSN 6320-01-388-3125
NSN 6220-00-095-3687
NSN 5999-01-192-6479
NSN 5835-00-373-2671
NSN 6685-01-012-0529
NSN 6105-00-595-5378
NSN 6110-00-104-4663
NSN 6130-01-362-0928
NSN 6610-01-599-4462
NSN 5985-00-241-9282