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 6650-01-005-0714
NSN 5910-01-471-8338
NSN 5950-01-480-4133
NSN 5945-01-073-2005
NSN 6110-01-529-4230
NSN 5960-01-065-0273
NSN 5975-01-391-7803
NSN 5960-01-189-5712
NSN 5975-01-485-3616
NSN 5960-01-010-3083
NSN 5975-00-775-2455
NSN 6685-00-995-4957