Hexagon Nut and Bolt Sizes
Determine the maximum torque according to bolt (nut) size and grade. Always consult the manufacturers instructions or engineering recommendations when making bolted connections.
Important: the hexagon sizes shown in the tables should be used as a guide only. Individual sizes should be checked before specifying any equipment. Use only Heavy Duty Impact Sockets for power driven torquing equipment, according to ISO2725 and ISO1174, DIN3129 and DIN3121 or ASME-B107.2/1995.
Metric
Thread Size D | Hexagon Size S | Hexagon Size J |
|---|---|---|
| M 10 | 17 mm | 8 mm |
| M 12 | 19 mm | 10 mm |
| M 14 | 22 mm | 12 mm |
| M 16 | 24 mm | 14 mm |
| M 18 | 27 mm | 14 mm |
| M 20 | 30 mm | 17 mm |
| M 22 | 32 mm | 17 mm |
| M 24 | 36 mm | 19 mm |
| M 27 | 41 mm | 19 mm |
| M 30 | 46 mm | 22 mm |
| M 33 | 50 mm | 24 mm |
| M 36 | 55 mm | 27 mm |
| M 39 | 60 mm | 27 mm |
| M 42 | 65 mm | 32 mm |
| M 45 | 70 mm | – |
| M 48 | 75 mm | 36 mm |
| M 52 | 80 mm | 36 mm |
| M 56 | 85 mm | 41 mm |
| M 60 | 90 mm | 46 mm |
| M 64 | 95 mm | 46 mm |
| M 68 | 100 mm | 50 mm |
| M 72 | 105 mm | 55 mm |
| M 76 | 110 mm | 60 mm |
| M 80 | 115 mm | 65 mm |
| M 85 | 120 mm | 70 mm |
| M 90 | 130 mm | 70 (75) mm |
| M 95 | 135 mm | – |
| M 100 | 145 mm | 85 mm |
| M 105 | 150 mm | – |
| M 110 | 155 mm | – |
| M 115 | 165 mm | – |
| M 120 | 170 mm | – |
| M 125 | 180 mm | – |
| M 130 | 185 mm | – |
| M 140 | 200 mm | – |
| M 150 | 210 mm | – |
Imperial
| Thread Size D | Hexagon Size S | Hexagon Size J |
|---|---|---|
| 5/8″ | 1 1/16″ | 1/2″ |
| 3/4″ | 1 1/4″ | 5/8″ |
| 7/8″ | 1 7/16″ | 3/4″ |
| 1″ | 1 5/8″ | 3/4″ |
| 1 1/8″ | 1 13/16″ | 7/8″ |
| 1 1/4″ | 2″ | 7/8″ |
| 1 3/8″ | 2 3/16″ | 1″ |
| 1 1/2″ | 2 3/8″ | 1″ |
| 1 5/8″ | 2 9/16″ | – |
| 1 3/4″ | 2 3/4″ | 1 1/4″ |
| 1 7/8″ | 2 15/16″ | 1 3/8″ |
| 2″ | 3 1/8″ | 1 5/8″ |
| 2 1/4″ | 3 1/2″ | 1 3/4″ |
| 2 1/2″ | 3 7/8″ | 1 7/8″ |
| 2 3/4″ | 4 1/4″ | 2″ |
| 3″ | 4 5/8″ | 2 1/4″ |
| 3 1/4″ | 5″ | 2 1/4″ |
