This Thompson Center manufactured second variation rearward upper tang screw with an unthreaded section under the head measures between 1.000" and 1.100" long and is for the later Hawken muzzle loading rifle. This rear tang screw is in very good condition with light slot wear. (file photo)

Note: Thompson Center Hawken muzzle loading rifles with the following serial numbers have been observed with this part:

Percussion: 73609, 111807, 141298, 275512, 368920, 437565 & 489495

Flintlock: 63277

Kit in Percussion: K145177 & K188746

Kit in Flintlock: