Engineering Tools
Reference data for specifying and sourcing fasteners correctly — the numbers a procurement or design engineer actually needs.
Threaded Insert (Metric) — Wire thread insert
Also referenced as: Helical wire insert type
Approximated dimensionsCoiled wire insert screwed into a tapped hole to create a durable, wear-resistant internal thread — common in aluminium/plastic housings that would otherwise strip. Free-state outer diameter is slightly larger than the tapped hole for a compression fit.
Illustrative — not to scale
| Thread size | Outer diameter (approx.) | Standard lengths |
|---|---|---|
| M6 | 7.2 mm | 1D / 1.5D / 2D / 2.5D / 3D |
| M8 | 9.6 mm | 1D / 1.5D / 2D / 2.5D / 3D |
| M10 | 12.0 mm | 1D / 1.5D / 2D / 2.5D / 3D |
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