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 5998-01-513-5602
NSN 5960-01-567-1096
NSN 6320-01-412-2973
NSN 6620-01-384-2105
NSN 5945-01-101-7572
NSN 6130-01-069-2514
NSN 2925-01-448-2880
NSN 5998-00-431-0342
NSN 5925-01-147-5725
NSN 5855-01-395-0676
NSN 5945-01-356-4135
NSN 5915-00-126-9683