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Square Nut Spec Table
Square Nut Specifications — 8 sizes
DIN 557
A square nut that fits into slots or channels to prevent rotation, commonly used in woodworking and frame assembly.
Practical Notes
- Insert into T-slot, then bolt tightening rotates nut 90° to lock. Verify slot width and nut size compatibility before insertion.
- When embedding in wood furniture, counterbore to nut thickness for a flush surface.
Selection Guide
Inserts into T-slots or channels to prevent rotation. Ideal for aluminum profile T-slots, woodworking, and press die T-grooves. Square edges bite into mating material for excellent anti-rotation.
Square NutDINSquare Nut
4 sizes| Nominal | d | P | H (Height) | B (Wrench) | Other |
|---|---|---|---|---|---|
| M6 | 6 | 1 | 5 | 10 | - |
| M8 | 8 | 1.25 | 6.5 | 13 | - |
| M10 | 10 | 1.5 | 8 | 17 | - |
| M12 | 12 | 1.75 | 10 | 19 | - |
Key Features
- Square shape inserts into T-slots/channels and prevents rotation
- DIN 557 (chamfered) / DIN 562 (thin); also used for tack positioning before welding
- Edge contact provides excellent embedment grip when fastening into wood
Key Applications
Aluminum profile T-slots, woodworking furniture, press die T-grooves, jig bases, timber structures
STEP File Downloads
Free 3D CAD models (STEP AP214). Built to real standard dimensions; threads are simplified (plain shank) per free-library convention.
DownloadM6.step
All sizes · CAD guide →FAQ
Difference between square nut and T-nut?
Square nuts are simple squares inserted into slots for anti-rotation. T-nuts have T-shapes for dedicated T-slot use. Use dedicated T-nuts for aluminum profiles.