A cylindrical or ball-shaped item fabricated of solid rubber, having a hole running through its center through which a threaded stem is inserted. A wing nut, two washers and the stem are supplied to apply pressure, thereby expanding the ball and plugging up inlet and outlet opening in radiators. It is used to locate leaks in the core or tank of a radiator and the like.
NSN 5965-00-993-5439
NSN 5835-01-077-6278
NSN 5935-00-153-3130
NSN 6105-00-889-6961
NSN 6150-01-592-5281
NSN 6320-01-352-5653
NSN 6610-01-280-3429
NSN 2925-01-494-3259
NSN 5975-01-599-9387
NSN 6685-00-965-5438
NSN 6620-01-422-3522
NSN 5920-01-413-7292