ASME B18.2.1 / DIN 571
Hexagon wood screw is also commonly called “hex lag screw” or “coach screw.”
Coach screws are heavy duty screws designed for metal to timber connections, or to join heavy timbers. They have a square or hexagonal head engineered to be used with a wrench, spanner, or pliers.
Usually comes in carbon steel with ZP or stainless steel with passivation.
Wood Screw
DIN 571 Weight (KG/M)
| l/d | M4 | M5 | M6 | M8 | M10 | M12 | M16 | M20 |
| 16 | 1.71 | 2.92 | ||||||
| 20 | 2.01 | 3.42 | 5.02 | |||||
| 25 | 2.41 | 4.02 | 5.82 | 11.5 | ||||
| 30 | 2.81 | 4.62 | 6.62 | 12.9 | 23.6 | |||
| 35 | 3.11 | 5.12 | 7.42 | 14.2 | 25.8 | 36.2 | ||
| 40 | 3.51 | 5.82 | 8.22 | 15.6 | 28 | 39.2 | ||
| 45 | 6.43 | 8.94 | 16.9 | 30 | 42.1 | |||
| 50 | 7.03 | 9.64 | 18.2 | 32.1 | 45.4 | 84.1 | ||
| 55 | 10.5 | 19.6 | 34.3 | 48.6 | 89.7 | |||
| 60 | 11.2 | 20.9 | 36.5 | 51.8 | 94.9 | 165 | ||
| 65 | 22.2 | 38.5 | 54.7 | 99.5 | 174 | |||
| 70 | 23.6 | 40.7 | 57.8 | 107 | 182 | |||
| 75 | 25 | 42.9 | 61 | 112 | 192 | |||
| 80 | 26.5 | 45.2 | 64.5 | 118 | 201 | |||
| 90 | 29.4 | 49.9 | 71 | 130 | 220 | |||
| 100 | 32 | 54 | 77.1 | 141 | 238 | |||
| 110 | 83.4 | 152 | 253 | |||||
| 120 | 89.5 | 163 | 275 | |||||
| 130 | 175 | 293 | ||||||
| 140 | 187 | 317 | ||||||
| 150 | 198 | 328 | ||||||
| 160 | 209 | 348 | ||||||
| 170 | 366 | |||||||
| 180 | 385 | |||||||
| 190 | 404 | |||||||
| 200 | 421 |
