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 2925-00-278-9468
NSN 5910-01-052-3958
NSN 5835-01-149-6855
NSN 6145-00-100-4358
NSN 6105-01-605-0717
NSN 5930-01-263-5005
NSN 5960-01-552-0862
NSN 5905-00-420-1484
NSN 5950-01-320-6408
NSN 6320-00-845-3261
NSN 6145-01-506-8222
NSN 6150-01-475-2878