I’m trying to find replacement barrel bolts to hold the scales on a fixed blade knife.

The dimensions, as best I can measure, are:

Barrel Section: 6mm diameter and 8mm long Screw Thread: 4mm diameter and 6mm long Heads: 8mm diameter and 3mm thick with 2.5mm hex sockets

I have done a fair amount of web searching and I have looked at several of the large online tool and fastener companies. Almost everything I can find has a much thinner barrel and wider head.

Can anyone suggest where I should look for these?