
The countersink must match the head angle. A mismatched cone leaves the head proud or creates line contact that deforms the panel as the mandrel pulls.
Material: Carbon Steel / Stainless Steel (customizable).
Confirm back-side clearance for the bearing footprint.
| Material | Carbon Steel / Stainless Steel (customizable) |
|---|---|
| Standard | GB/T 90.1, customer drawing |
| Head style | countersunk 90° |
Flushness checked after setting in a sample panel.Alternative materials and finishes can be quoted side by side during sampling, so cost and corrosion resistance can be traded off explicitly.