Hi, I am trying to find out what size hole is needed for a set of wheel studs that are listed as having a 13.1 spline diameter. If I had them with me I would do the measuring bit myself but I don't and want to get this drawing out to the laser cutters as soon as possible.

Thanks

Dave

I used a 14mm hole for 14.3 mm studs, which turned out to be v v tight. I would go for .1 or .2mm difference.

Cheers, went with 12.9 which should give them a good bite into the hub.

I would go for a 13mm but use a pillar drill, do a trail hole in a scrap piece of steal the same thickness. That way you could use a common drill size and nothing lost.