DIN 557 standard square nuts are four-sided nuts. They have a larger contact surface area, allowing for greater torque to be applied when tightening, making them less prone to loosening.
51Fasteners stocks metric standard square nuts in diameters ranging from M5 to M12; 6# to 1/2″. Click on the link to view related products: Square Nuts.
Specifications
| MM | P | e max | e min | k max | k min | s max | s min |
|---|---|---|---|---|---|---|---|
| M5 | 0.8 | 11.3 | 9.93 | 4 | 3.52 | 8 | 7.64 |
| M6 | 1 | 14.1 | 12.53 | 5 | 4.52 | 10 | 9.64 |
| M8 | 1.25 | 18.4 | 16.34 | 6.5 | 5.92 | 13 | 12.57 |
| M10 | 1.5 | 22.6 | 20.24 | 8 | 7.42 | 16 | 15.57 |
| M12 | 1.75 | 25.4 | 22.84 | 10 | 9.42 | 18 | 17.57 |
| M16 | 2 | 33.9 | 30.11 | 13 | 12.3 | 24 | 23.16 |