So I’ve assembled a collection of micrometers and vernier calipers of varying quality, and it’s time to dive in and measure some very small things. Some of you will be metrology enthusiasts ...

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 ...

I'm not sure what size the bolt is, so I'll need to measure it. I've got the vernier caliper as it allows me to take really accurate measurements. I'll then need to get the new bolt and replace it.