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 5855-01-379-1410
NSN 5975-00-423-7122
NSN 5935-01-005-0018
NSN 4140-01-158-9515
NSN 6620-00-518-3595
NSN 5950-01-427-3723
NSN 2925-01-391-9247
NSN 6105-00-289-9993
NSN 5950-01-573-6434
NSN 5975-01-121-2238
NSN 5920-01-550-1810
NSN 6150-01-200-5228