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 5998-00-880-0316
NSN 6110-00-019-3485
NSN 6610-00-720-8775
NSN 5895-00-283-5581
NSN 6240-01-352-3642
NSN 5975-01-100-1063
NSN 5998-01-442-6676
NSN 5975-00-862-4506
NSN 6130-01-480-8108
NSN 5905-01-533-7899
NSN 7035-01-330-4799
NSN 5975-01-395-1366