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 6110-00-669-6586
NSN 5950-00-596-8102
NSN 5835-01-213-0833
NSN 5920-01-480-7007
NSN 5950-01-411-6124
NSN 5945-01-014-0624
NSN 7035-00-631-3782
NSN 6320-01-362-4818
NSN 5965-00-775-6496
NSN 6650-01-244-1573
NSN 6620-01-505-3496
NSN 7035-01-580-0957