Nut / Bolt Id Board

[mklotz]

To save a bit of fabrication effort I just used a commercial thread gauge. Thread a bolt and its matching nut in each hole...



If things get too crowded, use the reverse side of the gauge to stagger the bolt placements...



This scheme provides space for fastener sizes you may not yet have in your collection. Also, it accommodates metric as well as inferial fasteners.
Also, having the nuts removable from the board allows checking threads on devices where the stud cannot be removed.