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 5905-01-574-4456
NSN 5950-00-539-7948
NSN 5990-01-492-4837
NSN 5855-01-391-7472
NSN 5950-00-554-4870
NSN 5975-01-132-6430
NSN 4140-01-181-9669
NSN 5950-01-384-3738
NSN 5975-01-381-0753
NSN 6130-01-579-3738
NSN 6610-00-725-6081
NSN 4140-00-411-5962