DIN 557 Square Nuts
We supply DIN 557 square nuts
DIN 557 dimensions
| Diameter | Pitch | Height | Width |
|---|---|---|---|
| M4 | 0.7mm | 3.2mm | 7.0mm |
| M5 | 0.8mm | 4.0mm | 8.0mm |
| M6 | 1.0mm | 5.0mm | 10.0mm |
| M8 | 1.25mm | 6.50mm | 13.0mm |
| M10 | 1.5mm | 8.0mm | 17.0mm |
| M12 | 1.75mm | 10.0mm | 19.0mm |
Materials & strength
Square form
The four flats give a large bearing face and let the nut be captivated in a channel or recess so it can be tightened without a second spanner.
Mild steel
A general-purpose material for light and medium fixing duties where a property-class nut is not specified.
What is a DIN 557 square nut?
DIN 557 covers standard-height square nuts. The four-sided form gives a large bearing face and flats that are easy to hold or captivate, which is why square nuts persist in channel, timber and agricultural work.
Why choose a square nut over a hexagon nut?
The square form offers a larger contact area and can be held against rotation by a slot, channel or recess, so the fixing can be tightened from one side. In soft materials such as timber the corners bed in and help resist turning.
What is the difference between DIN 557 and DIN 562?
DIN 557 is the standard-height square nut, while DIN 562 is the thin pattern in the smaller sizes, commonly used with sheet metal and light fabrications. Height and size coverage are the practical differences.
What materials are DIN 557 square nuts available in?
DIN 557 square nuts are available in mild steel across a wide range of metric sizes. If your drawing calls for a different material or finish, we supply specials made to drawing.
Need DIN 557 in a non-standard size or material?
Send us your drawing — specials quoted within 24 hours.