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 6320-01-029-4220
NSN 5975-01-373-5517
NSN 5990-00-928-2261
NSN 5998-01-555-7564
NSN 5999-01-540-4592
NSN 2925-01-197-7864
NSN 6240-00-006-3725
NSN 6320-01-302-5157
NSN 6240-01-419-5626
NSN 5950-01-281-7506
NSN 6685-01-516-5748
NSN 7035-01-364-8454