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 5855-00-925-7887
NSN 5965-01-406-6320
NSN 5960-00-496-6473
NSN 5985-00-080-8648
NSN 7035-01-419-4317
NSN 6130-00-040-3626
NSN 5985-00-646-8310
NSN 6150-00-026-7902
NSN 6135-01-159-9705
NSN 6130-00-186-0737
NSN 5930-00-195-5510
NSN 5895-00-433-3275