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 6620-00-725-7289
NSN 5950-00-953-1570
NSN 5895-01-133-6510
NSN 5855-00-411-8688
NSN 5950-00-926-8521
NSN 5930-00-035-4739
NSN 6110-00-578-7243
NSN 5950-01-634-0677
NSN 6685-00-228-6983
NSN 5930-01-408-2229
NSN 5990-00-366-0112
NSN 6130-00-416-6592