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 6150-01-131-6887
NSN 5930-00-902-8980
NSN 6105-00-595-5378
NSN 6130-00-438-9271
NSN 5990-00-462-9112
NSN 5915-01-041-3680
NSN 5990-00-630-6154
NSN 6105-00-071-1752
NSN 5965-01-257-7085
NSN 6240-01-123-0475
NSN 2925-01-244-3016
NSN 5996-00-767-0291