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 5835-01-131-2027
NSN 5895-00-344-7335
NSN 6320-01-144-3810
NSN 4140-01-492-1614
NSN 2925-00-473-5834
NSN 6645-01-619-4813
NSN 5905-01-116-5406
NSN 6110-01-412-8549
NSN 6145-01-258-4738
NSN 6650-01-433-3520
NSN 5930-01-226-5902
NSN 5935-01-207-4834