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 5999-01-478-0707
NSN 6145-01-394-8939
NSN 5960-01-141-6489
NSN 5965-00-445-1843
NSN 5985-00-203-1200
NSN 5985-01-260-5585
NSN 6135-00-274-4037
NSN 5999-00-038-7756
NSN 6105-01-605-9341
NSN 5935-00-001-5871
NSN 6620-01-443-1214
NSN 2925-01-157-9204