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 5990-00-786-0702
NSN 5999-00-960-8232
NSN 6135-01-092-4734
NSN 5960-01-124-8336
NSN 6110-01-459-7236
NSN 5915-00-242-4292
NSN 5975-00-266-2029
NSN 6620-00-290-6505
NSN 6610-01-511-0982
NSN 6105-00-799-8897
NSN 5905-01-254-0841
NSN 6610-01-527-8006