On the bench specifying M10 Hex Socket Cone Point Set Screw — GB/T 78 / ISO 4027 (Series 027)? This page gives the controlling dimensions for the M10 size of Hex Socket Cone Point Set Screw — GB/T 78 / ISO 4027 (Series 027) (to GB/T 78 / ISO 4027).
M10 Dimensional Row (GB/T 78 / ISO 4027)
| Size | Pitch (mm) | Length L (mm) | Hex socket s (mm) | Engagement depth t min (mm) | Point diameter dp (mm) | Reference standard |
|---|---|---|---|---|---|---|
| M10 | 1.5 | 15 | 5.0 | 5.0 | 7.0 | ISO 4026-4029 / GB/T 77-79 |
Spanner & Drive for M10 Hex Socket Cone Point Set Screw — GB/T 78 / ISO 4027 (Series 027)
The hex socket for M10 Hex Socket Cone Point Set Screw — GB/T 78 / ISO 4027 (Series 027) 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 M10
| Coarse-thread pitch (ISO 724) | 1.5 mm |
|---|---|
| Through-hole / clearance (ISO 273 medium) | 11 mm |
| Tapping drill, coarse thread | 8.5 mm |
Tightening Torque for M10
| Class 8.8 (dry, ~µ 0.125) | ≈ 49 Nm |
|---|---|
| Class 10.9 (dry, ~µ 0.125) | ≈ 69 Nm |
| Class 12.9 (dry, ~µ 0.125) | ≈ 83 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 M10 Hex Socket Cone Point Set Screw — GB/T 78 / ISO 4027 (Series 027)
M10 Hex Socket Cone Point Set Screw — GB/T 78 / ISO 4027 (Series 027) are commonly specified for machine assembly, general engineering, plant maintenance and OEM equipment.
Mating Parts for M10
For M10, pair with a M10 hex nut (ISO 4032 / DIN 934) and, where used, a M10 flat washer (ISO 7089 / DIN 125A) under the head and under the nut.
When to Step Up or Down from M10
When the joint preload approaches the proof load of M10 class 8.8, step up to M12 class 8.8 (or move to M10 class 10.9). When the joint is over-specified, M8 often saves weight and cost without losing the safety margin.