Best 5/16 X 18 Tap Drill Size
Century Drill & Tool 95105 High Carbon Steel Fractional Plug Tap, 5/16-18 NCNeiko 10047A 12” Extra Long Drill Bit Set, 5 Piece | 1/8", 3/16", 1/4", 5/16", 3/8"CHANNELLOCK 1765536#10x32 NF SA Tap/DrillHanson 1765539 Pts Drill Plus Tap Combo 5/16"-18/F for Tap Die ...