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 6135-00-793-1809
NSN 5998-01-619-6041
NSN 6110-01-511-9917
NSN 5935-01-324-8631
NSN 5835-00-372-3736
NSN 5975-00-068-3532
NSN 5910-01-539-7240
NSN 6240-01-286-7448
NSN 5905-01-166-1888
NSN 2925-01-363-5978
NSN 5999-01-393-1422
NSN 6240-00-847-8091