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 7035-01-132-7209
NSN 2925-01-019-8735
NSN 5930-01-147-1319
NSN 5998-00-229-9166
NSN 6145-00-526-3056
NSN 7035-01-448-4740
NSN 5950-01-495-1879
NSN 6320-01-228-2380
NSN 5985-00-999-1526
NSN 5930-00-432-6047
NSN 5975-01-044-6002
NSN 6320-01-358-0141