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 6145-00-998-3579
NSN 6240-00-237-7878
NSN 5905-01-256-1437
NSN 6220-00-592-0268
NSN 5945-01-280-4497
NSN 5855-01-425-1330
NSN 6135-00-823-3034
NSN 5965-01-131-7496
NSN 2925-00-734-0516
NSN 6105-01-063-7704
NSN 5855-00-198-3197
NSN 5960-01-279-2589