M16 Hex Socket Dog Point Set Screw — GB/T 79 / ISO 4029 (Series 018) is the m16-thread variant of Hex Socket Dog Point Set Screw — GB/T 79 / ISO 4029 (Series 018) manufactured to GB/T 79 / ISO 4029. This page focuses on the data engineers reach for at the bench: dimensional values for the M16 size, the spanner/drive that fits, and the assembly data you need to install it.
M16 Dimensional Row (GB/T 79 / ISO 4029)
| Size | Pitch (mm) | Length L (mm) | Hex socket s (mm) | Engagement depth t min (mm) | Point diameter dp (mm) | Reference standard |
|---|---|---|---|---|---|---|
| M16 | 2.0 | 24 | 8.0 | 8.0 | 12.0 | ISO 4026-4029 / GB/T 77-79 |
Spanner & Drive for M16 Hex Socket Dog Point Set Screw — GB/T 79 / ISO 4029 (Series 018)
The hex socket for M16 Hex Socket Dog Point Set Screw — GB/T 79 / ISO 4029 (Series 018) 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 Hex Socket Dog Point Set Screw — GB/T 79 / ISO 4029 (Series 018)
M16 Hex Socket Dog Point Set Screw — GB/T 79 / ISO 4029 (Series 018) are commonly specified for heavier machine assembly and equipment mounting.
Installation Tips for M16 Hex Socket Dog Point Set Screw — GB/T 79 / ISO 4029 (Series 018)
- Use a quality Allen key fully seated in the socket — partial engagement is the most common cause of stripped sockets at this size.
- For countersunk and button-head variants, chamfer the through-hole to seat the head flush without preloading the head/shank fillet.
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.