When you need Socket Head Cap Screw — GB/T 70.1 / ISO 4762 (Series 014) in the M16 size, the controlling values come from GB/T 70.1 / ISO 4762. This page lists them in one place — pitch, head geometry, tool size and the matching hole.
M16 Dimensional Row (GB/T 70.1 / ISO 4762)
| Size | Pitch (mm) | Length L (mm) | Head diameter dk (mm) | Head height k (mm) | Hex socket s (mm) | Reference standard |
|---|---|---|---|---|---|---|
| M16 | 2.0 | 100 | 24.0 | 16 | 14.0 | ISO 4762 / GB/T 70.1 |
Spanner & Drive for M16 Socket Head Cap Screw — GB/T 70.1 / ISO 4762 (Series 014)
The hex socket for M16 Socket Head Cap Screw — GB/T 70.1 / ISO 4762 (Series 014) is shown in the spec table — use the matching Allen / hex key (an ISO 2936 hex key set covers the full range). A T-handle Allen key gives the best feel for setting preload by feel; for production work use a torque-controlled driver.
Hole Sizes for M16
| Coarse-thread pitch (ISO 724) | 2 mm |
|---|---|
| Through-hole / clearance (ISO 273 medium) | 17.5 mm |
| Tapping drill, coarse thread | 14 mm |
Tightening Torque for M16
| Class 8.8 (dry, ~µ 0.125) | ≈ 210 Nm |
|---|---|
| Class 10.9 (dry, ~µ 0.125) | ≈ 295 Nm |
| Class 12.9 (dry, ~µ 0.125) | ≈ 355 Nm |
Indicative dry-joint values. Lubrication can lower the required torque by 15–25%. Always confirm against the joint design, especially when going up a strength class.
Common Applications for M16 Socket Head Cap Screw — GB/T 70.1 / ISO 4762 (Series 014)
M16 Socket Head Cap Screw — GB/T 70.1 / ISO 4762 (Series 014) are commonly specified for heavier machine assembly and equipment mounting.
Mating Parts for M16
For M16, pair with a M16 hex nut (ISO 4032 / DIN 934) and, where used, a M16 flat washer (ISO 7089 / DIN 125A) under the head and under the nut.
When to Step Up or Down from M16
When the joint preload approaches the proof load of M16 class 8.8, step up to M20 class 8.8 (or move to M16 class 10.9). When the joint is over-specified, M12 often saves weight and cost without losing the safety margin.