NUTS – MOST COMMON METRIC STANDARD SPECIFICATIONS
| DIN 934 | Hexagon Nuts |
| ASTM A194M | Standard Specification for Carbon and Alloy Steel Nuts for Bolts for High Pressure or High Temperature Service, or Both (Metric) |
| ANSI B18.16.3M | DIMENSIONAL REQUIREMENTS FOR PREVAILING-TORQUE TYPE STEEL METRIC HEX NUTS AND HEX FLANGE NUTS |
| SAE J995 | Mechanical and Material Requirements for Metric Steel Nuts |
| DIN 985 | Nylon Insert Lock Nuts |
METRIC HEX NUTS
- METRIC BASIC DIMENSIONS FINISH NUTS/li>
- METRIC THREAD PITCH
- METRIC COUPLING NUTS
- METRIC HEX NUTS – STRENGTH
- METRIC HEAVY HEX NUTS – 2H
- BASIC DIMENSIONS NYLON INSERT LOCK NUTS
HEX NUTS – BASIC DIMENSIONS
METRIC BASIC DIMENSIONS FINISH NUTS
| Size | Width Across Flats | Finished Full Nuts | Finished Jam Nut |
|---|---|---|---|
| Thick- ness |
Thick- ness |
||
| 4 | 7 | 3.2 | 2.2 |
| 5 | 8 | 4 | 2.7 |
| 6 | 10 | 5 | 3.2 |
| 7 | 11 | 5.5 | |
| 8 | 13 | 6.5 | 4 |
| 10 | 17 | 8 | 5 |
| 12 | 19 | 10 | 6 |
| 14 | 22 | 11 | 7 |
| 16 | 24 | 13 | 8 |
| 18 | 27 | 15 | 9 |
| 20 | 30 | 27 | 10 |
| 22 | 32 | 18 | 11 |
| 24 | 36 | 19 | 12 |
| 27 | 41 | 22 | 13.35 |
| 30 | 46 | 24 | 15 |
| 33 | 50 | 26 | 16.5 |
| 36 | 55 | 29 | 18 |
| 39 | 60 | 31 | |
| 42 | 65 | 34 | |
| 45 | 70 | 36 | |
| 48 | 75 | 38 | |
| 52 | 80 | 42 |
STANDARD THREAD PITCH
| Size | Coarse Thread | Fine Thread | Extra Fine Thread |
|---|---|---|---|
| 4 | 0.7 | ||
| 5 | 0.8 | ||
| 6 | 1.0 | 0.8 | |
| 7 | 1.0 | ||
| 8 | 1.3 | 1.0 | |
| 10 | 1.5 | 1.3 | 1.0 |
| 12 | 1.5 | 1.3 | 1.0 |
| 14 | 2.0 | 1.5 | |
| 16 | 2.0 | 1.5 | 1.0 |
| 18 | 2.5 | 2.0 | 1.5 |
| 20 | 2.5 | 2.0 | 1.5 |
| 22 | 2.5 | 2.0 | 1.5 |
| 24 | 3.0 | 2.0 | 1.5 |
| 27 | 3.0 | 2.0 | 1.5 |
| 30 | 3.5 | 2.0 | 1.5 |
| 33 | 3.5 | 2.0 | 1.5 |
| 36 | 4.0 | 3.0 | 2.0 |
| 39 | 4.0 | 3.0 | |
| 42 | 4.5 | 3.0 | 2.0 |
| 45 | 4.5 | ||
| 48 | 5.0 | 3.0 | 2.0 |
| 52 | 5.0 | 2.0 |
METRIC COUPLING NUTS
| Size | Length | Width Across Flats |
|---|---|---|
| 6 | 25 | 10 |
| 8 | 30 | 13 |
| 10 | 30 | 17 |
| 12 | 40 | 19 |
| 16 | 50 | 24 |
| 20 | 50 | 30 |
| 24 | 50 | 36 |
| 30 | 60.0 | 46.0 |
METRIC HEX NUTS – STRENGTH
| Property Class | Hardness | Proof Load Strength (MPa) |
|---|---|---|
| 6 | Rb 70/Rc 32 | 680 Mpa |
| Class 8 M6 to M16 | Rb80/Rc 32 | 880 Mpa |
| Class 8 over M16 | Rc 23/Rc 35 | 920 Mpa |
| 10 | Rc 26/36 | 1040 Mpa |
METRIC HEAVY HEX NUTS – 2H
| Size | Height | Wrench Size |
|---|---|---|
| 12-1.75 | 12 | 21 |
| 14-2 | 14 | 24 |
| 16-2 | 16 | 27 |
| 18-2.5 | 18 | 30 |
| 20-2.5 | 20 | 34 |
| 22-2.5 | 22 | 36 |
| 24-3.0 | 24 | 41 |
| 27-3.0 | 27 | 46 |
| 30-3.5 | 30 | 50 |
| 36-4.0 | 36 | 60 |
BASIC DIMENSIONS NYLON INSERT LOCK NUTS
| Size | Width Across Flats | Thickness | Wrenching Height |
|---|---|---|---|
| 4 | 7 | 5.0 | 2.9 |
| 5 | 8 | 5.0 | 3.2 |
| 6 | 10 | 6.0 | 4.0 |
| 8 | 13 | 8.0 | 5.5 |
| 10 | 17 | 10.0 | 6.5 |
| 12 | 19 | 12.0 | 8.0 |
| 14 | 22 | 14.0 | 9.5 |
| 16 | 24 | 16.0 | 10.5 |
| 18 | 27 | 18.5 | 13.0 |
| 20 | 30 | 20.0 | 14.0 |
| 22 | 32 | 22.0 | 15.0 |
| 24 | 36 | 24.0 | 15.0 |
| 27 | 41 | 27.0 | 17.0 |
| 30 | 46 | 30.0 | 19.0 |
| 33 | 50 | 33.0 | 22.0 |
| 36 | 55 | 36.0 | 25.0 |
| 42 | 65 | 42.0 | 29.0 |
| 48 | 75 | 48.0 | 36.0 |