Tap drill sizes
Tap drill sizes by thread
Pick a thread for its tap drill at 75% thread, the alternatives from 60 to 80%, clearance holes and thread dimensions.
SheetIndex
BasisResearched
Checked2026-09-24
Unified UNF#0-80Tap drill 3/64"Unified UNC#1-64Tap drill #53Unified UNF#1-72Tap drill #53Unified UNC#2-56Tap drill #50Unified UNF#2-64Tap drill #50Unified UNC#3-48Tap drill #47Unified UNF#3-56Tap drill #45Unified UNC#4-40Tap drill #43Unified UNF#4-48Tap drill #42Unified UNC#5-40Tap drill #38Unified UNF#5-44Tap drill #37Unified UNC#6-32Tap drill #36Unified UNF#6-40Tap drill #33Unified UNC#8-32Tap drill #29Unified UNF#8-36Tap drill #29Unified UNC#10-24Tap drill #25Unified UNF#10-32Tap drill #21Unified UNC#12-24Tap drill #16Unified UNF#12-28Tap drill #14Unified UNC1/4-20Tap drill #7Unified UNF1/4-28Tap drill #3Unified UNC5/16-18Tap drill FUnified UNF5/16-24Tap drill IUnified UNC3/8-16Tap drill 5/16"Unified UNF3/8-24Tap drill QUnified UNC7/16-14Tap drill UUnified UNF7/16-20Tap drill 25/64"Unified UNC1/2-13Tap drill 27/64"Unified UNF1/2-20Tap drill 29/64"Unified UNC9/16-12Tap drill 31/64"Unified UNF9/16-18Tap drill 33/64"Unified UNC5/8-11Tap drill 17/32"Unified UNF5/8-18Tap drill 37/64"Unified UNC3/4-10Tap drill 21/32"Unified UNF3/4-16Tap drill 11/16"Unified UNC7/8-9Tap drill 49/64"Unified UNF7/8-14Tap drill 13/16"Unified UNC1-8Tap drill 7/8"Unified UNF1-12Tap drill 59/64"Unified UNS1-14Tap drill 15/16"ISO metric coarse pitchM1.6x0.35Tap drill 1.25 mmISO metric coarse pitchM2x0.4Tap drill 1.6 mmISO metric coarse pitchM2.5x0.45Tap drill 2.05 mmISO metric coarse pitchM3x0.5Tap drill 2.5 mmISO metric fine pitchM3x0.35Tap drill 2.65 mmISO metric coarse pitchM3.5x0.6Tap drill 2.9 mmISO metric coarse pitchM4x0.7Tap drill 3.3 mmISO metric fine pitchM4x0.5Tap drill 3.5 mmISO metric coarse pitchM5x0.8Tap drill 4.2 mmISO metric fine pitchM5x0.5Tap drill 4.5 mmISO metric coarse pitchM6x1Tap drill 5 mmISO metric fine pitchM6x0.75Tap drill 5.25 mmISO metric coarse pitchM8x1.25Tap drill 6.8 mmISO metric fine pitchM8x1Tap drill 7 mmISO metric coarse pitchM10x1.5Tap drill 8.5 mmISO metric fine pitchM10x1.25Tap drill 8.8 mmISO metric fine pitchM10x1Tap drill 9 mmISO metric coarse pitchM12x1.75Tap drill 10.2 mmISO metric fine pitchM12x1.5Tap drill 10.5 mmISO metric fine pitchM12x1.25Tap drill 10.8 mmISO metric coarse pitchM14x2Tap drill 12 mmISO metric fine pitchM14x1.5Tap drill 12.5 mmISO metric coarse pitchM16x2Tap drill 14 mmISO metric fine pitchM16x1.5Tap drill 14.5 mmISO metric coarse pitchM18x2.5Tap drill 15.5 mmISO metric fine pitchM18x1.5Tap drill 16.5 mmISO metric coarse pitchM20x2.5Tap drill 17.5 mmISO metric fine pitchM20x1.5Tap drill 18.5 mmISO metric coarse pitchM22x2.5Tap drill 19.5 mmISO metric fine pitchM22x1.5Tap drill 20.5 mmISO metric coarse pitchM24x3Tap drill 21 mmISO metric fine pitchM24x2Tap drill 22 mmISO metric coarse pitchM27x3Tap drill 24 mmISO metric coarse pitchM30x3.5Tap drill 26.5 mmISO metric fine pitchM30x2Tap drill 28 mmISO metric coarse pitchM36x4Tap drill 32 mm
