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 6610-01-525-7266
NSN 6620-00-090-1601
NSN 6610-01-130-5101
NSN 5930-01-406-4281
NSN 6110-00-999-1592
NSN 5975-01-473-7811
NSN 5935-01-054-3556
NSN 5835-00-453-1969
NSN 5930-01-568-6832
NSN 5905-00-723-9802
NSN 6240-01-556-7096
NSN 5835-01-422-2399