Identify through-hole component with many pins

This is probably an IC. The code on the top should identify the device, so searching for it might yield what the device is. AllDatasheet.com is a good place to start searching for device codes.

Here are some common multiple-pin chips that people have found in things:

16 Pin

 * ULN2003 / ULN2003A - Darlington Driver

18 Pin

 * ULN2803 / ULN2803A - Darlington Driver