I used to have a little old school yellow and black book that had tolerances and thread sizes etc etc... very useful! I need one and can't remember where i got it from or who sold them.
My version of that is the Pocket Ref by Thomas J. Glover but the cover is black and silver. It is from the Engineering Publications Group in Pottstown, PA 800 755-6634. Mine is from 1996 and a newer version may have a different cover or they may publish more than one book like this.
If you can’t find yours you might try the Pocket Ref.
Berkshire - I don't think so. On the back of my 1974 metric revision it just has a few conversion factors, pi to six figures, and also, for no earthly reason I can think of, the speed of light!