Square Nut (DIN 557 / DIN 562)
Square nuts have four sides instead of six, providing more wrenching grip than a hex nut and dropping cleanly into a square pocket or channel. Common in woodworking applications (Tee-nut backers), in T-slot frames, and in electrical/architectural hardware.
Specifications
| Standards | DIN 557 (regular), DIN 562 (thin) |
|---|---|
| Size Range | M5 – M20 |
| Material | Carbon steel, Stainless |
| Surface Finish | Plain, Zinc plated |
Frequently Asked Questions
When should I use a square nut instead of a hex nut?
Square nuts make sense when the nut needs to seat in a square pocket (preventing rotation), when wider wrenching surface is needed for hand-wrench tightening, or when matching historical/aesthetic style. For most general fastening, hex remains the default.
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