M20 Turnbuckle — ISO / DIN (Series 156) is the m20-thread variant of Turnbuckle — ISO / DIN (Series 156) manufactured to ISO / DIN. This page focuses on the data engineers reach for at the bench: dimensional values for the M20 size, the spanner/drive that fits, and the assembly data you need to install it.
M20 Dimensional Row (ISO / DIN)
| Thread size | Total length closed (mm) | Take-up length (mm) | Working load limit (kg) | Material | Reference standard |
|---|---|---|---|---|---|
| M20 | 290 | 215 | 1200 | Drop-forged steel, hot-dip galvanized | DIN 1480 / GB/T 5973 |
Spanner & Drive for M20 Turnbuckle — ISO / DIN (Series 156)
Drive geometry for M20 Turnbuckle — ISO / DIN (Series 156) is given by the row above; match the tool to the listed values.
Common Applications for M20 Turnbuckle — ISO / DIN (Series 156)
M20 Turnbuckle — ISO / DIN (Series 156) are commonly specified for general engineering applications.
Installation Tips for M20 Turnbuckle — ISO / DIN (Series 156)
- At M20 the stretch in the bolt becomes the controlling factor — for critical joints, use angle-controlled or stretch-controlled tightening instead of pure torque.
When to Step Up or Down from M20
When the joint preload approaches the proof load of M20 class 8.8, step up to M24 class 8.8 (or move to M20 class 10.9). When the joint is over-specified, M16 often saves weight and cost without losing the safety margin.