Best drill size 6-32 tap
Greenlee DTAPKIT 6-32 to 1/4-20 6-Piece Combination Drill and Tap SetAUTOTOOLHOME Combination Drill and Tap Bit 6-32nc 8-32nc 10-32nc 10-24nc 12-24nc 1/4-20nc Set of 6GREENLEE DTAP6-32 Combination Drill and Tap Bit, 6-32NC - 3 PackKlein Tools 32237 Drill Tap, 6-32Drill America #6-32 Carbon Steel Tap Set (Set of 3), ...