Selecting Phillips Pan Head Machine Screw — GB/T 818 / ISO 7045 (Series 035), M6, in GB/T 818 / ISO 7045: the dimensional row from the standard plus the tools and hole sizes follow. Use them with the technical drawing below — the drawing redraws to the exact size you pick.
M6 Dimensional Row (GB/T 818 / ISO 7045)
| Size | Pitch (mm) | Length L (mm) | Head diameter dk (mm) | Head height k (mm) | Cross recess | Reference standard |
|---|---|---|---|---|---|---|
| M6 | 1.0 | 40 | 12.0 | 3.6 | PH3 | ISO 7045 / GB/T 818 |
Spanner & Drive for M6 Phillips Pan Head Machine Screw — GB/T 818 / ISO 7045 (Series 035)
M6 Phillips Pan Head Machine Screw — GB/T 818 / ISO 7045 (Series 035) use a PH3 cross recess. Match the driver bit to the recess (Phillips PH / Pozi PZ are NOT interchangeable).
Hole Sizes for M6
| Coarse-thread pitch (ISO 724) | 1 mm |
|---|---|
| Through-hole / clearance (ISO 273 medium) | 6.6 mm |
| Tapping drill, coarse thread | 5 mm |
Tightening Torque for M6
| Class 8.8 (dry, ~µ 0.125) | ≈ 10 Nm |
|---|---|
| Class 10.9 (dry, ~µ 0.125) | ≈ 14 Nm |
| Class 12.9 (dry, ~µ 0.125) | ≈ 17 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 M6 Phillips Pan Head Machine Screw — GB/T 818 / ISO 7045 (Series 035)
M6 Phillips Pan Head Machine Screw — GB/T 818 / ISO 7045 (Series 035) are commonly specified for machine assembly, general engineering, plant maintenance and OEM equipment.
Installation Tips for M6 Phillips Pan Head Machine Screw — GB/T 818 / ISO 7045 (Series 035)
- Pozidriv (PZ) drivers ride out of Phillips (PH) recesses and vice versa — confirm the recess marking on the head before assembly.
- For automated assembly, an ACR (Anti-Cam-Out Ribs) or torx-equivalent driver gives noticeably longer bit life than plain PH.
When to Step Up or Down from M6
When the joint preload approaches the proof load of M6 class 8.8, step up to M8 class 8.8 (or move to M6 class 10.9). When the joint is over-specified, M5 often saves weight and cost without losing the safety margin.