Precision-drilled holes in aluminum heat sinks for secure component attachment and thermal management.
| Parameter | Typical range | Notes & selection driver |
|---|---|---|
| Depth | Full material thickness or specified depth for blind holes | |
| Diameter | M2, M2.5, M3, M4, #4-40, #6-32, etc. (metric/imperial) | |
| Hole Type | Through-hole, blind hole, tapped, or clearance | |
| Thread Pitch | Standard coarse or fine pitch (e.g., M3x0.5) | |
| Surface Finish | Deburred, anodized (non-conductive type II or conductive type III), or plain mill finish | |
| Positional Tolerance | ±0.1mm to ±0.5mm typical | |
| Counterbore/Countersink | For flush or recessed fastener heads |
Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.
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They ensure secure mechanical attachment and maintain consistent clamping pressure for optimal thermal contact between the component and heat sink, directly impacting cooling efficiency and long-term reliability.
Thread stripping in aluminum, hole misalignment causing poor thermal contact, over-torquing leading to sink deformation or cracking, and corrosion at fastener interfaces.
For low-cycle assembly or prototypes, direct tapping is acceptable. For production or high-cycle applications, threaded inserts (helicoils, press-fit nuts) are recommended to prevent thread wear and ensure durability.
Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.