Drill Bit Diameters & Tapping Sizes Chart

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Our interactive drill bit / tapping size chart provides a list of different sizes of drill bits, thread pitches, and the appropriate tap size for each, which is essential tool for anyone who wants to achieve optimal results with their drilling and tapping projects. No-matter who you are, a size chart can help you work smarter, not harder, and achieve the best possible outcome for your projects.


Clear Filters
Pitch (mm)
Pitch Type
Tap Drill Size (mm)
M1 0.25mm Standard (Coarse) 0.75mm
M1 0.2mm Fine 0.8mm
M1.1 0.25mm Standard (Coarse) 0.85mm
M1.1 0.2mm Fine 0.9mm
M1.2 0.25mm Standard (Coarse) 0.95mm
M1.2 0.2mm Fine 1mm
M1.4 0.3mm Standard (Coarse) 1.1mm
M1.4 0.2mm Fine 1.2mm
M1.6 0.35mm Standard (Coarse) 1.25mm
M1.6 0.2mm Fine 1.4mm
M1.8 0.35mm Standard (Coarse) 1.45mm
M1.8 0.2mm Fine 1.6mm
M2 0.4mm Standard (Coarse) 1.6mm
M2 0.25mm Fine 1.75mm
M2.2 0.45mm Standard (Coarse) 1.75mm
M2.2 0.25mm Fine 1.95mm
M2.5 0.45mm Standard (Coarse) 2.05mm
M2.5 0.35mm Fine 2.15mm
M3 0.5mm Standard (Coarse) 2.5mm
M3 0.35mm Fine 2.65mm
M3.5 0.6mm Standard (Coarse) 2.9mm
M3.5 0.35mm Fine 3.15mm
M4 0.7mm Standard (Coarse) 3.3mm
M4 0.5mm Fine 3.5mm
M4.5 0.75mm Standard (Coarse) 3.75mm
M4.5 0.5mm Fine 4mm
M5 0.8mm Standard (Coarse) 4.2mm
M5 0.5mm Fine 4.5mm
M5.5 0.5mm Fine 5mm
M6 1mm Standard (Coarse) 5mm
M6 0.75mm Fine 5.25mm
M7 1mm Standard (Coarse) 6mm
M7 0.75mm Fine 6.25mm
M8 1.25mm Standard (Coarse) 6.75mm
M8 1mm Fine 7mm
M8 0.75mm Fine 7.25mm
M9 1.25mm Standard (Coarse) 7.75mm
M9 1mm Fine 8mm
M9 0.75mm Fine 8.25mm
M10 1.5mm Standard (Coarse) 8.5mm
M10 1.25mm Fine 8.75mm
M10 1mm Fine 9mm
M10 0.75mm Fine 9.25mm
M11 1.5mm Standard (Coarse) 9.5mm
M11 1mm Fine 10mm
M11 0.75mm Fine 10.25mm
M12 1.75mm Standard (Coarse) 10.25mm
M12 1.5mm Fine 10.5mm
M12 1.25mm Fine 10.75mm
M12 1mm Fine 11mm
M14 2mm Standard (Coarse) 12mm
M14 1.5mm Fine 12.5mm
M14 1mm Fine 13mm
M15 1.5mm Fine 13.5mm
M15 1mm Fine 14mm
M16 2mm Standard (Coarse) 14mm
M16 1.5mm Fine 14.5mm
M16 1mm Fine 15mm
M17 1.5mm Fine 15.5mm
M17 1mm Fine 16mm
M18 2.5mm Standard (Coarse) 15.5mm
M18 2mm Fine 16mm
M18 1.5mm Fine 16.5mm
M18 1mm Fine 17mm
M20 2.5mm Standard (Coarse) 17.5mm
M20 2mm Fine 18mm
M20 1.5mm Fine 18.5mm
M20 1mm Fine 19mm
M22 2.5mm Standard (Coarse) 19.5mm
M22 2mm Fine 20mm
M22 1.5mm Fine 20.5mm
M22 1mm Fine 21mm
M24 3mm Standard (Coarse) 21mm
M24 2mm Fine 22mm
M24 1.5mm Fine 22.5mm
M24 1mm Fine 23mm
M25 2mm Fine 23mm
M25 1.5mm Fine 23.5mm
M25 1mm Fine 24mm
M26 1.5mm Fine 24.5mm
M27 3mm Standard (Coarse) 24mm
M27 2mm Fine 25mm
M27 1.5mm Fine 25.5mm
M27 1mm Fine 26mm
M28 2mm Fine 26mm
M28 1.5mm Fine 26.5mm
M28 1mm Fine 27mm
M30 3.5mm Standard (Coarse) 26.5mm
M30 3mm Fine 27mm
M30 2mm Fine 28mm
M30 1.5mm Fine 28.5mm
M30 1mm Fine 29mm
M32 2mm Fine 30mm
M32 1.5mm Fine 30.5mm
M33 3.5mm Standard (Coarse) 29.5mm
M33 3mm Fine 30mm
M33 2mm Fine 31mm
M33 1.5mm Fine 31.5mm
M36 4mm Standard (Coarse) 32mm
M36 3mm Fine 33mm
M36 2mm Fine 34mm
M36 1.5mm Fine 34.5mm
M38 1.5mm Fine 36.5mm
M39 4mm Standard (Coarse) 35mm
M39 3mm Fine 36mm
M39 2mm Fine 37mm
M39 1.5mm Fine 37.5mm
M40 3mm Fine 37mm
M40 2mm Fine 38mm
M40 1.5mm Fine 38.5mm
M42 4.5mm Standard (Coarse) 37.5mm
M42 4mm Fine 38mm
M42 3mm Fine 39mm
M42 2mm Fine 40mm
M42 1.5mm Fine 40.5mm
M45 4.5mm Standard (Coarse) 40.5mm
M45 4mm Fine 41mm
M45 3mm Fine 42mm
M45 2mm Fine 43mm
M45 1.5mm Fine 43.5mm
M48 5mm Standard (Coarse) 43mm
M48 4mm Fine 44mm
M48 3mm Fine 45mm
M48 2mm Fine 46mm
M48 1.5mm Fine 46.5mm
M50 3mm Fine 47mm
M50 2mm Fine 48mm
M50 1.5mm Fine 48.5mm
M52 5mm Standard (Coarse) 47mm
M52 4mm Fine 48mm
M52 3mm Fine 49mm
M52 2mm Fine 50mm
M52 1.5mm Fine 50.5mm
M55 4mm Fine 51mm
M55 3mm Fine 52mm
M55 2mm Fine 53mm
M55 1.5mm Fine 53.5mm
M56 5.5mm Standard (Coarse) 50.5mm
M56 4mm Fine 52mm
M56 3mm Fine 53mm
M56 2mm Fine 54mm
M56 1.5mm Fine 54.5mm
M58 4mm Fine 54mm
M58 3mm Fine 55mm
M58 2mm Fine 56mm
M58 1.5mm Fine 56.5mm
M60 5.5mm Standard (Coarse) 54.5mm
M60 4mm Fine 56mm
M60 3mm Fine 57mm
M60 2mm Fine 58mm
M60 1.5mm Fine 58.5mm
M62 4mm Fine 58mm
M62 3mm Fine 59mm
M62 2mm Fine 60mm
M62 1.5mm Fine 60.5mm
M64 6mm Standard (Coarse) 58mm
M64 4mm Fine 60mm
M64 3mm Fine 61mm
M64 2mm Fine 62mm
M64 1.5mm Fine 62.5mm
M65 4mm Fine 61mm
M65 3mm Fine 62mm
M65 2mm Fine 63mm
M65 1.5mm Fine 63.5mm
M68 6mm Standard (Coarse) 62mm
M68 4mm Fine 64mm
M68 3mm Fine 65mm
M68 2mm Fine 66mm
M68 1.5mm Fine 66.5mm
M70 6mm Fine 64mm
M70 4mm Fine 66mm
M70 3mm Fine 67mm
M70 2mm Fine 68mm
M70 1.5mm Fine 68.5mm
M72 6mm Fine 66mm
M72 4mm Fine 68mm
M72 3mm Fine 69mm
M72 2mm Fine 70mm
M72 1.5mm Fine 70.5mm
M75 4mm Fine 71mm
M75 3mm Fine 72mm
M75 2mm Fine 73mm
M75 1.5mm Fine 73.5mm
M76 6mm Fine 70mm
M76 4mm Fine 72mm
M76 3mm Fine 73mm
M76 2mm Fine 74mm
M76 1.5mm Fine 74.5mm
M78 2mm Fine 76mm
M80 6mm Fine 74mm
M80 4mm Fine 76mm
M80 3mm Fine 77mm
M80 2mm Fine 78mm
M80 1.5mm Fine 78.5mm
M82 2mm Fine 80mm
M85 6mm Fine 79mm
M85 4mm Fine 81mm
M85 3mm Fine 82mm
M85 2mm Fine 83mm
M90 6mm Fine 84mm
M90 4mm Fine 86mm
M90 3mm Fine 87mm
M90 2mm Fine 88mm
M95 6mm Fine 89mm
M95 4mm Fine 91mm
M95 3mm Fine 92mm
M95 2mm Fine 93mm
M100 6mm Fine 94mm
M100 4mm Fine 96mm
M100 3mm Fine 97mm
M100 2mm Fine 98mm
M105 6mm Fine 99mm
M105 4mm Fine 101mm
M105 3mm Fine 102mm
M105 2mm Fine 103mm
M110 6mm Fine 104mm
M110 4mm Fine 106mm
M110 3mm Fine 107mm
M110 2mm Fine 108mm
M115 6mm Fine 109mm
M115 4mm Fine 111mm
M115 3mm Fine 112mm
M115 2mm Fine 113mm
M120 6mm Fine 114mm
M120 4mm Fine 116mm
M120 3mm Fine 117mm
M120 2mm Fine 118mm
M125 8mm Fine 117mm
M125 6mm Fine 119mm
M125 4mm Fine 121mm
M125 3mm Fine 122mm
M125 2mm Fine 123mm
M130 8mm Fine 122mm
M130 6mm Fine 124mm
M130 4mm Fine 126mm
M130 3mm Fine 127mm
M130 2mm Fine 128mm
M135 6mm Fine 129mm
M135 4mm Fine 131mm
M135 3mm Fine 132mm
M135 2mm Fine 133mm
M140 8mm Fine 132mm
M140 6mm Fine 134mm
M140 4mm Fine 136mm
M140 3mm Fine 137mm
M140 2mm Fine 138mm
M145 6mm Fine 139mm
M145 4mm Fine 141mm
M145 3mm Fine 142mm
M145 2mm Fine 143mm
M150 8mm Fine 142mm
M150 6mm Fine 144mm
M150 4mm Fine 146mm
M150 3mm Fine 147mm
M150 2mm Fine 148mm
M155 6mm Fine 149mm
M155 4mm Fine 151mm
M155 3mm Fine 152mm
M160 8mm Fine 152mm
M160 6mm Fine 154mm
M160 4mm Fine 156mm
M160 3mm Fine 157mm
M165 6mm Fine 159mm
M165 4mm Fine 161mm
M165 3mm Fine 162mm
M170 8mm Fine 162mm
M170 6mm Fine 164mm
M170 4mm Fine 166mm
M170 3mm Fine 167mm
M175 6mm Fine 169mm
M175 4mm Fine 171mm
M175 3mm Fine 172mm
M180 8mm Fine 172mm
M180 6mm Fine 174mm
M180 4mm Fine 176mm
M180 3mm Fine 177mm
M185 6mm Fine 179mm
M185 4mm Fine 181mm
M185 3mm Fine 182mm
M190 8mm Fine 182mm
M190 6mm Fine 184mm
M190 4mm Fine 186mm
M190 3mm Fine 187mm
M195 6mm Fine 189mm
M195 4mm Fine 191mm
M195 3mm Fine 192mm
M200 8mm Fine 192mm
M200 6mm Fine 194mm
M200 4mm Fine 196mm
M200 3mm Fine 197mm
M205 6mm Fine 199mm
M205 4mm Fine 201mm
M205 3mm Fine 202mm
M210 8mm Fine 202mm
M210 6mm Fine 204mm
M210 4mm Fine 206mm
M210 3mm Fine 207mm
M215 6mm Fine 209mm
M215 4mm Fine 211mm
M215 3mm Fine 212mm
M220 8mm Fine 212mm
M220 6mm Fine 214mm
M220 4mm Fine 216mm
M220 3mm Fine 217mm
M225 6mm Fine 219mm
M225 4mm Fine 221mm
M225 3mm Fine 222mm
M230 8mm Fine 222mm
M230 6mm Fine 224mm
M230 4mm Fine 226mm
M230 3mm Fine 227mm
M235 6mm Fine 229mm
M235 4mm Fine 231mm
M235 3mm Fine 232mm
M240 8mm Fine 232mm
M240 6mm Fine 234mm
M240 4mm Fine 236mm
M240 3mm Fine 237mm
M245 6mm Fine 239mm
M245 4mm Fine 241mm
M245 3mm Fine 242mm
M250 8mm Fine 242mm
M250 6mm Fine 244mm
M250 4mm Fine 246mm
M250 3mm Fine 247mm
M255 6mm Fine 249mm
M255 4mm Fine 251mm
M260 8mm Fine 252mm
M260 6mm Fine 254mm
M260 4mm Fine 256mm
M265 6mm Fine 259mm
M265 4mm Fine 261mm
M270 8mm Fine 262mm
M270 6mm Fine 264mm
M270 4mm Fine 266mm
M275 6mm Fine 269mm
M275 4mm Fine 271mm
M280 8mm Fine 272mm
M280 6mm Fine 274mm
M280 4mm Fine 276mm
M285 6mm Fine 279mm
M285 4mm Fine 281mm
M290 8mm Fine 282mm
M290 6mm Fine 284mm
M290 4mm Fine 286mm
M295 6mm Fine 289mm
M295 4mm Fine 291mm
M300 8mm Fine 292mm
M300 6mm Fine 294mm
M300 4mm Fine 296mm

Data based off of the ISO-261 standard