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 5998-01-163-3104
NSN 5996-01-318-3163
NSN 2925-01-164-4197
NSN 2925-01-265-2853
NSN 5990-00-725-7813
NSN 6685-01-443-6202
NSN 5925-01-279-8216
NSN 6620-01-432-7032
NSN 5950-01-419-1413
NSN 6320-00-593-0379
NSN 6685-00-403-1226
NSN 5920-00-269-6178