Metric
| NOMINAL DIAMETERS |
PITCHES | ||||
|---|---|---|---|---|---|
| Coarse | Fine | ||||
| M1 | 0.25 | 0.2 | - | - | - |
| M1.1 | 0.25 | 0.2 | - | - | - |
| M1.2 | 0.25 | 0.2 | - | - | - |
| M1.4 | 0.3 | 0.2 | - | - | - |
| M1.6 | 0.35 | 0.2 | - | - | - |
| M1.8 | 0.35 | 0.2 | - | - | - |
| M2 | 0.4 | 0.25 | - | - | - |
| M2.2 | 0.45 | 0.25 | - | - | - |
| M2.5 | 0.45 | 0.35 | - | - | - |
| M3 | 0.5 | 0.35 | - | - | - |
| M3.5 | 0.6 | 0.35 | - | - | - |
| M4 | 0.7 | 0.5 | - | - | - |
| M4.5 | 0.75 | 0.5 | - | - | - |
| M5 | 0.8 | 0.5 | - | - | - |
| M5.5* | - | 0.5 | - | - | - |
| M6 | 1 | 0.75 | - | - | - |
| M7 | 1 | 0.75 | - | - | - |
| M8 | 1.25 | 1 | 0.75 | - | - |
| M9* | 1.25 | 1 | 0.75 | - | - |
| M10 | 1.5 | 1.25 | 1 | 0.75 | - |
| M11* | 1.5 | 1 | 0.75 | - | - |
| M12 | 1.75 | 1.5 | 1.25 | 1 | - |
| M14 | 2 | 1.5 | 1.25 | 1 | - |
| M15* | - | 1.5 | - | 1 | - |
| M16 | 2 | 1.5 | - | 1 | - |
| M17* | - | 1.5 | - | 1 | - |
| M18 | 2.5 | 2 | 1.5 | 1 | - |
| M20 | 2.5 | 2 | 1.5 | 1 | - |
| M22 | 2.5 | 2 | 1.5 | 1 | - |
| M24 | 3 | 2 | 1.5 | 1 | - |
| M25* | - | 2 | 1.5 | 1 | - |
| M26* | - | 1.5 | - | - | - |
| M27 | 3 | 2 | 1.5 | 1 | - |
| M28* | - | 2 | 1.5 | 1 | - |
| M30 | 3.5 | 3 | 2 | 1.5 | 1 |
| M32* | - | - | 2 | 1.5 | - |
| M33 | 3.5 | 3 | 2 | 1.5 | - |
| M35* | - | - | - | 1.5 | - |
| M36 | 4 | 3 | 2 | 1.5 | - |
| M38* | - | - | - | 1.5 | - |
| M39 | 4 | 3 | 2 | 1.5 | - |
| M40* | - | 3 | 2 | 1.5 | - |
| M42 | 4.5 | 4 | 3 | 2 | 1.5 |
| M45 | 4.5 | 4 | 3 | 2 | 1.5 |
| M48 | 5 | 4 | 3 | 2 | 1.5 |
| M50* | - | - | 3 | 2 | 1.5 |
| M52 | 5 | 4 | 3 | 2 | 1.5 |
| M55* | - | 4 | 3 | 2 | 1.5 |
| M56 | 5.5 | 4 | 3 | 2 | 1.5 |
| M58* | - | 4 | 3 | 2 | 1.5 |
| M60 | 5.5 | 4 | 3 | 2 | 1.5 |
| M62* | - | 4 | 3 | 2 | 1.5 |
| M64 | 6 | 4 | 3 | 2 | 1.5 |
| M65* | 6 | 4 | 3 | 2 | 1.5 |
| M68 | 6 | 4 | 3 | 2 | 1.5 |
| M70* | 6 | 4 | 3 | 2 | 1.5 |
| M72 | 6 | 4 | 3 | 2 | 1.5 |
| M76 | 6 | 4 | 3 | 2 | 1.5 |
| M80 | 6 | 4 | 3 | 2 | 1.5 |
| M85 | 6 | 4 | 3 | 2 | - |
| M90 | 6 | 4 | 3 | 2 | - |
| M95 | 6 | 4 | 3 | 2 | - |
| M100 | 6 | 4 | 3 | 2 | - |
| M105 | 6 | 4 | 3 | 2 | - |
| M110 | 6 | 4 | 3 | 2 | - |
| M115 | 6 | 4 | 3 | 2 | - |
| M120 | 6 | 4 | 3 | 2 | - |
| M125 | 6 | 4 | 3 | 2 | - |
| M130 | 6 | 4 | 3 | 2 | - |
| M135* | 6 | 4 | 3 | 2 | - |
| M140 | 6 | 4 | 3 | 2 | - |
| M145* | 6 | 4 | 3 | 2 | - |
| M150 | 6 | 4 | 3 | 2 | - |
| M155* | 6 | 4 | 3 | - | - |
| M160 | 6 | 4 | 3 | - | - |
*3rd Choice
Inch
| NOMINAL DIAMETERS |
NO. OF THREADS PER INCH | |||
|---|---|---|---|---|
| UNC | UNF | BSW | BSF | |
| 1/8 | 40 | 44 | 40 | - |
| 5/32 | 32 | 36 | 32 | - |
| 3/16 | 24 | 32 | 24 | 32 |
| 1/4 | 20 | 28 | 20 | 26 |
| 5/16 | 18 | 24 | 18 | 22 |
| 3/8 | 16 | 24 | 16 | 20 |
| 7/16 | 14 | 20 | 14 | 18 |
| 1/2 | 13 | 20 | 12 | 16 |
| 9/16 | 12 | 18 | 12 | 16 |
| 5/8 | 11 | 18 | 11 | 14 |
| 3/4 | 10 | 16 | 10 | 12 |
| 7/8 | 9 | 14 | 9 | 11 |
| 1 | 8 | 12 | 8 | 10 |
| 1.1/8 | 7 | 12 | 7 | 9 |
| 1.1/4 | 7 | 12 | 7 | 9 |
| 1.3/8 | 6 | 12 | 6 | 8 |
| 1.1/2 | 6 | 12 | 6 | 8 |
| 1.5/8 | 5 | - | 5 | 8 |
| 1.3/4 | 5 | - | 5 | 7 |
| 2 | 4.5 | - | 4.5 | 7 |
| 2.1/4 | 4.5 | - | 4 | 6 |
| 2.1/2 | 4 | - | 4 | 6 |
| 2.3/4 | 4 | - | 3.5 | 6 |
| 3 | 4 | - | 3.5 | 5 |
For detailed information, please refer to complete governing standards.