Observed arrival · 2026-10-23
Screw Size Chart
A free lookup tool for screw and bolt sizes that returns thread details and recommended tap, pilot, and clearance holes.
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ƒJS
- For
- DIYers and people identifying screw sizes
- Worth noticing
- A bare “#8” defaults to a machine screw unless the user switches the type to wood screw.
Field notes
The page distinguishes inch machine, metric, and wood screws rather than treating a size marking as sufficient on its own. Users can add a thread count or pitch to select a series, while an unspecified thread defaults to the standard coarse option. The reference explains the different roles of tap, pilot, and clearance holes, and cautions against using its results for safety, load, or torque decisions.
Observed signals
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Editorial observations of this landing page, not a rating.
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