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 5945-00-450-5928
NSN 6145-01-388-6985
NSN 6220-01-271-9589
NSN 6620-01-565-8740
NSN 5835-00-501-2581
NSN 2925-01-454-2046
NSN 7035-01-547-7415
NSN 5935-01-480-1714
NSN 5855-00-494-9581
NSN 5855-01-606-3587
NSN 6650-01-004-1625
NSN 5965-01-260-2547