Wood screw reference
#8 screw Pilot Hole Size
For #8 screw, start around 5/64 in in softwood and 3/32 in in hardwood. Use 11/64 in when the screw should pass through the top piece without biting.
#8 screw pilot hole quick answer
| Screw | Softwood pilot | Hardwood pilot | Clearance hole | Note |
|---|---|---|---|---|
| #6 screw | 1/16 in | 5/64 in | 9/64 in | Small trim and cabinet hardware. |
| #8 screw | 5/64 in | 3/32 in | 11/64 in | Common wood screw size for general shop work. |
| #10 screw | 3/32 in | 7/64 in | 13/64 in | Use larger pilot holes in dense hardwoods. |
| #12 screw | 7/64 in | 1/8 in | 15/64 in | Useful for heavier fixtures and outdoor work. |
When to adjust the pilot hole
Dense hardwood, brass screws, near-edge fastening, and long screws usually need more conservative drilling than soft construction lumber. Test in scrap when splitting or screw breakage would matter.
Related references
Screw Size ChartFind screw size references, pilot holes, and clearance hole starting points.Pilot Hole vs Clearance HoleThe difference between pilot holes, tap drill holes, and clearance holes with practical examples.Clearance Hole ChartCompare close-fit and free-fit clearance holes for common screws and bolts.