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 6620-01-307-6740
NSN 6135-01-200-5144
NSN 5920-01-474-2227
NSN 5985-01-463-8475
NSN 6650-01-391-6072
NSN 5920-01-011-6536
NSN 5930-00-156-0954
NSN 6145-01-010-4665
NSN 5999-01-162-0822
NSN 5835-00-443-1079
NSN 6105-01-260-5554
NSN 6610-00-052-8020