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 6220-00-142-5115
NSN 6610-00-781-5787
NSN 5915-00-185-5355
NSN 2925-01-394-9658
NSN 5985-00-820-3011
NSN 6320-00-564-2772
NSN 5930-01-346-3994
NSN 6135-00-715-4001
NSN 5985-01-194-3286
NSN 6150-01-334-1394
NSN 5998-01-149-9005
NSN 6685-01-147-5617