More versatile finger plate

[Toolmaker51]

Mr. K's fixture plate is a good layout.
The offset, alternating rows offer greatest density of attachments, compared to square or rectangular patterns.
Use of a common thread is important, shoulder [aka stripper] bolts are terrific reference/ locating pins. No other common threaded fasteners have decent concentricity between thread portion and body or head, with flat head screws worst of all.