A couple of years ago we published a look at precision measurement tools, in particular vernier calipers and micrometer screw gauges. It featured a look at how they work and how they’re used, and a ...

THE production of a satisfactory screw gauge is a matter of considerable difficulty as regards both manufacture and testing, and the pamphlet on this subject just issued by the National Physical ...

How to pick the right size bolt or nut every time for DIY projects Using a bolt, nut and screw gauge takes the guesswork out of your project, helping you quickly identify the exact size you need.