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 5965-01-124-1817
NSN 6240-00-297-3919
NSN 5895-01-090-7564
NSN 5985-01-289-0941
NSN 6220-01-228-9583
NSN 5915-01-100-4105
NSN 6105-01-418-3944
NSN 5960-01-472-9562
NSN 6110-01-226-4681
NSN 4140-01-064-6474
NSN 5985-01-064-1363
NSN 6610-01-520-6889