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 6220-01-526-1469
NSN 5998-00-277-7552
NSN 6620-01-446-6571
NSN 5998-01-049-2781
NSN 5975-01-268-3107
NSN 5835-00-435-6638
NSN 2925-00-789-1106
NSN 5998-01-611-2509
NSN 5945-00-302-9392
NSN 6105-00-807-0713
NSN 5965-01-447-2992
NSN 6220-00-443-0589