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 5975-01-352-9336
NSN 6650-01-487-9454
NSN 5990-01-497-0093
NSN 6135-01-106-7740
NSN 6220-01-492-6920
NSN 6105-00-433-9504
NSN 6105-00-490-4838
NSN 5950-01-119-4201
NSN 5999-01-191-4476
NSN 6240-00-138-3082
NSN 6320-01-378-6191
NSN 5920-01-072-6610