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 5960-00-478-1167
NSN 6620-01-604-7532
NSN 6105-01-260-4205
NSN 5935-00-518-5027
NSN 6135-01-128-5358
NSN 6220-01-203-7555
NSN 5835-00-198-4936
NSN 5855-00-011-5816
NSN 6220-01-190-6906
NSN 6610-00-106-7980
NSN 6135-01-567-0739
NSN 6685-01-379-0162