Drill rod sizes

[micrometer]

Please recommend the most useful drill rod diameters for gunsmith work. I'll most likely use them for sear, trigger, sight, barrel band... pins.

Thanks for any recommendations.
Mike

 

[beag_nut]

You're going to need more than just drill rod if you wish to do all those things you mentioned. For instance, tool steel bars, which won't require you to machine down a rod to get a rectangular cross-section. Plus, tool steel comes in many alloys to suit the job you are doing.