A drill bit/tapping size chart is an 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.
Diameter |
Pitch (mm) |
Pitch Type |
Tap Drill Size (mm) |
|---|---|---|---|
| M1 | 0.25mm | Standard | 0.75mm |
| M1 | 0.2mm | Fine | 0.8mm |
| M1.1 | 0.25mm | Standard | 0.85mm |
| M1.1 | 0.2mm | Fine | 0.9mm |
| M1.2 | 0.25mm | Standard | 0.95mm |
| M1.2 | 0.2mm | Fine | 1mm |
| M1.4 | 0.3mm | Standard | 1.1mm |
| M1.4 | 0.2mm | Fine | 1.2mm |
| M1.6 | 0.35mm | Standard | 1.25mm |
| M1.6 | 0.2mm | Fine | 1.4mm |
| M1.8 | 0.35mm | Standard | 1.45mm |
| M1.8 | 0.2mm | Fine | 1.6mm |
| M2 | 0.4mm | Standard | 1.6mm |
| M2 | 0.25mm | Fine | 1.75mm |
| M2.2 | 0.45mm | Standard | 1.75mm |
| M2.2 | 0.25mm | Fine | 1.95mm |
| M2.5 | 0.45mm | Standard | 2.05mm |
| M2.5 | 0.35mm | Fine | 2.15mm |
| M3 | 0.5mm | Standard | 2.5mm |
| M3 | 0.35mm | Fine | 2.65mm |
| M3.5 | 0.6mm | Standard | 2.9mm |
| M3.5 | 0.35mm | Fine | 3.15mm |
| M4 | 0.7mm | Standard | 3.3mm |
| M4 | 0.5mm | Fine | 3.5mm |
| M4.5 | 0.75mm | Standard | 3.75mm |
| M4.5 | 0.5mm | Fine | 4mm |
| M5 | 0.8mm | Standard | 4.2mm |
| M5 | 0.5mm | Fine | 4.5mm |
| M5.5 | 0.5mm | Fine | 5mm |
| M6 | 1mm | Standard | 5mm |
| M6 | 0.75mm | Fine | 5.25mm |
| M7 | 1mm | Standard | 6mm |
| M7 | 0.75mm | Fine | 6.25mm |
| M8 | 1.25mm | Standard | 6.75mm |
| M8 | 1mm | Fine | 7mm |
| M8 | 0.75mm | Fine | 7.25mm |
| M9 | 1.25mm | Standard | 7.75mm |
| M9 | 1mm | Fine | 8mm |
| M9 | 0.75mm | Fine | 8.25mm |
| M10 | 1.5mm | Standard | 8.5mm |
| M10 | 1.25mm | Fine | 8.75mm |
| M10 | 1mm | Fine | 9mm |
| M10 | 0.75mm | Fine | 9.25mm |
| M11 | 1.5mm | Standard | 9.5mm |
| M11 | 1mm | Fine | 10mm |
| M11 | 0.75mm | Fine | 10.25mm |
| M12 | 1.75mm | Standard | 10.25mm |
| M12 | 1.5mm | Fine | 10.5mm |
| M12 | 1.25mm | Fine | 10.75mm |
| M12 | 1mm | Fine | 11mm |
| M14 | 2mm | Standard | 12mm |
| M14 | 1.5mm | Fine | 12.5mm |
| M14 | 1mm | Fine | 13mm |
| M15 | 1.5mm | Fine | 13.5mm |
| M15 | 1mm | Fine | 14mm |
| M16 | 2mm | Standard | 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 | 15.5mm |
| M18 | 2mm | Fine | 16mm |
| M18 | 1.5mm | Fine | 16.5mm |
| M18 | 1mm | Fine | 17mm |
| M20 | 2.5mm | Standard | 17.5mm |
| M20 | 2mm | Fine | 18mm |
| M20 | 1.5mm | Fine | 18.5mm |
| M20 | 1mm | Fine | 19mm |
| M22 | 2.5mm | Standard | 19.5mm |
| M22 | 2mm | Fine | 20mm |
| M22 | 1.5mm | Fine | 20.5mm |
| M22 | 1mm | Fine | 21mm |
| M24 | 3mm | Standard | 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 | 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 | 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 | 29.5mm |
| M33 | 3mm | Fine | 30mm |
| M33 | 2mm | Fine | 31mm |
| M33 | 1.5mm | Fine | 31.5mm |
| M36 | 4mm | Standard | 32mm |
| M36 | 3mm | Fine | 33mm |
| M36 | 2mm | Fine | 34mm |
| M36 | 1.5mm | Fine | 34.5mm |
| M38 | 1.5mm | Fine | 36.5mm |
| M39 | 4mm | Standard | 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 | 37.5mm |
| M42 | 4mm | Fine | 38mm |
| M42 | 3mm | Fine | 39mm |
| M42 | 2mm | Fine | 40mm |
| M42 | 1.5mm | Fine | 40.5mm |
| M45 | 4.5mm | Standard | 40.5mm |
| M45 | 4mm | Fine | 41mm |
| M45 | 3mm | Fine | 42mm |
| M45 | 2mm | Fine | 43mm |
| M45 | 1.5mm | Fine | 43.5mm |
| M48 | 5mm | Standard | 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 | 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 | 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 | 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 | 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 | 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
