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 6145-01-310-8597
NSN 6610-01-168-6352
NSN 5835-00-447-1924
NSN 5905-01-250-6703
NSN 5895-01-054-3799
NSN 5915-01-151-3057
NSN 6650-00-406-2645
NSN 6685-01-212-7314
NSN 5935-00-269-5516
NSN 5935-01-433-2291
NSN 6145-01-057-3282
NSN 6135-01-586-5018