Posted it over on OWWM forum and was told it is a drawbore pin..................and I believe it!
Again I learn Something New
Here's a description i found
“Hook-pin, or draw-bore-pin, a piece of steel in the shape of a fustrum of a cone, rather tapered, and inserted into a handle, with the greatest diameter next to the handle, for driving through the draw-bores of a mortise and tenon, in order to bring the shoulder of the rail close home to the abutment on the edge of the style”.
The wooden-handled variety of steel draw-bore pins are intended for dry-assembling framed carcasses and door frames etc. to check the fit prior to committing to finally hammering home the wooden pegs.