[comfortcat]

I got this with my RV9-A kit and it is the most useful bolt gauge.

What is it called and can I order one from Van's? See attachment.

 

[rmartingt]

Well, Spruce has this one and I like mine...

https://www.aircraftspruce.com/catalog/hapages/boltgauges.php

 

[wirejock]

Bolt gauge

I wish the powers that be hadn't changed to MS part numbers. Those AN numbers had meaning.

 

[johnbright]

There’s also a drill guage. You’d want one for numbered drills vs fractional. Spruce PN 12-00378.

Beware the tap drill sizes shown on this drill gauge are for aluminum, steel uses a larger bit for shallower threads, also the bolt clearance hole sizes shown are slightly large, for instance for #10 bolt “body drill” it shows #11 whereas we normally use #12.
.

 

[Webb]

Mighty handy and use all the time. Got it years ago with my first build.
Looks like my writing so I think I marked the holes.