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 5998-01-498-2070
NSN 5855-01-364-1005
NSN 5915-01-420-6944
NSN 5925-01-254-2578
NSN 6105-01-421-3598
NSN 6610-00-353-9990
NSN 6240-01-599-2679
NSN 5935-01-178-6036
NSN 6685-01-005-0325
NSN 6130-00-277-7321
NSN 5996-01-535-0652
NSN 5910-00-031-6812