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 6150-00-764-5809
NSN 5905-00-942-9764
NSN 5930-01-596-4400
NSN 5985-01-461-3419
NSN 4140-00-868-1817
NSN 5965-01-412-5946
NSN 6610-00-817-8772
NSN 5925-01-171-1834
NSN 5996-01-103-6567
NSN 5925-01-410-6962
NSN 2925-01-463-8856
NSN 5965-01-546-0164