Nut
010203
DIN 985 Refined Nylon Lock Nut
Basic conceptsproducts
1. Other names: Root Nut, Anti loosening Nut, Nazi.
2. Usage: Lock threaded external joints or other pipe fittings.
The working principle of a nut is to use the frictional force between the nut and the bolt for self-locking. However, the reliability of this self-locking will decrease under dynamic loads. In some important occasions, we will take some anti loosening measures to ensure the reliability of nut locking.
Locking nuts are one of the anti loosening measures.
The anti loosening effect of nylon locking nuts mainly depends on the interaction force between the nut and bolt engagement threads. There are many ways to improve the interaction force between the meshing threads, such as improving the thread structure of the Schbiler nut, roughening the nylon nut, and surface treatment of the thread.
Usageproducts
Nylon lock nuts are used as follows123:
Insert the nylon lock nut into the thread and turn it tightly by hand, taking care not to use force.
When using power tools for tightening, the torque should be appropriately adjusted to avoid the danger caused by over-tightening.
Attention should be paid to maintaining the vertical when tightening, so as to avoid unnecessary deviation and failure of the fastening force.
Tighten the lock nut onto the bolt until it fits snugly against the material it is holding in.
Then, tighten the second nut onto the lock nut so that the teeth of the lock nut bite the thread of the bolt, locking it in place.
Install the washers at the threaded ends of the correctly sized stainless steel bolts or stud bolts first.
Replace the nut or bolt that locks the bolt by hand until you encounter resistance so that the nylon is inserted.
Tighten the lock nut firmly and, by using a wrench, replace the original nut and rotate clockwise.
If the bolt head is tight, use the same second wrench to tighten it while tightening the nut.
| Thread size | M3 | M4 | M5 | M6 | M7 | M8 | M10 | M12 | M14 | M16 | M18 | |
| Pitch | Coarse teeth | 0.5 | 0.7 | 0.8 | 1 | 1 | 1.25 | 1.5 | 1.75 | 2 | 2 | 2.5 |
| Fine teeth 1 | / | / | / | / | / | 1 | 1 | 1.5 | 1.5 | 1.5 | 2 | |
| Fine teeth 2 | / | / | / | / | / | / | 1.25 | 1.25 | / | / | 1.5 | |
| minimum | 3 | 4 | 5 | 6 | 7 | 8 | 10 | 12 | 14 | 16 | 18 | |
| maximum | 3.45 | 4.6 | 5.75 | 6.75 | 7.75 | 8.75 | 10.8 | 13 | 15.1 | 17.3 | 19.5 | |
| minimum | 4.6 | 5.9 | 6.9 | 8.9 | 9.6 | 11.6 | 15.6 | 17.4 | 20.5 | 22.5 | 24.9 | |
| minimum | 6.01 | 7.66 | 8.79 | 11.05 | 12.12 | 14.38 | 18.9 | 21.1 | 24.49 | 26.75 | 29.56 | |
| Maximum = Nominal value | 4 | 5 | 5 | 6 | 7.5 | 8 | 10 | 12 | 14 | 16 | 18.5 | |
| minimum | 3.7 | 4.7 | 4.7 | 5.7 | 7.14 | 7.64 | 9.64 | 11.57 | 13.3 | 15.3 | 17.66 | |
| minimum | 2.4 | 2.9 | 3.2 | 4 | 4.7 | 5.5 | 6.5 | 8 | 9.5 | 10.5 | 13 | |
| minimum | 1.65 | 2.2 | 2.75 | 3.3 | 3.85 | 4.4 | 5.5 | 6.6 | 7.7 | 8.8 | 9.9 | |
| Maximum = Nominal value | 5.5 | 7 | 8 | 10 | 11 | 13 | 17 | 19 | 22 | 24 | 27 | |
| minimum | 5.32 | 6.78 | 7.78 | 9.78 | 10.73 | 12.73 | 16.73 | 18.67 | 21.67 | 23.67 | 26.16 | |
| 1,000 pieces weigh kg | 0.5 | 1 | 1.4 | 2.4 | 3 | 5.1 | 10.6 | 17.2 | 26 | 34 | 45 | |
| Thread size | M20 | M22 | M24 | M27 | M30 | M33 | M36 | M39 | M42 | M45 | M48 | |
| Pitch | Coarse teeth | 2.5 | 2.5 | 3 | 3 | 3.5 | 3.5 | 4 | 4 | 4.5 | 4.5 | 5 |
| Fine teeth 1 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 3 | |
| Fine teeth 2 | 1.5 | 1.5 | / | / | / | / | / | / | / | / | / | |
| minimum | 20 | 22 | 24 | 27 | 30 | 33 | 36 | 39 | 42 | 45 | 48 | |
| maximum | 21.6 | 23.7 | 25.9 | 29.1 | 32.4 | 35.6 | 38.9 | 42.1 | 45.4 | 48.6 | 51.8 | |
| minimum | 27.7 | 29.5 | 33.2 | 38 | 42.7 | 46.6 | 51.1 | 55.9 | 60.6 | 64.7 | 69.4 | |
| minimum | 32.95 | 35.03 | 39.55 | 45.2 | 50.85 | 55.37 | 60.79 | 66.44 | 72.09 | 76.95 | 82.6 | |
| Maximum = Nominal value | 20 | 22 | 24 | 27 | 30 | 33 | 36 | 39 | 42 | 45 | 48 | |
| minimum | 18.7 | 20.7 | 22.7 | 25.7 | 28.7 | 31.4 | 34.4 | 37.4 | 40.4 | 43.4 | 46.4 | |
| minimum | 14 | 15 | 15 | 17 | 19 | 22 | 25 | 27 | 29 | 32 | 36 | |
| minimum | 11 | 12.2 | 13.2 | 14.8 | 16.5 | 18.2 | 19.8 | 21.5 | 23.1 | 24.8 | 26.5 | |
| Maximum = Nominal value | 30 | 32 | 36 | 41 | 46 | 50 | 55 | 60 | 65 | 70 | 75 | |
| minimum | 29.16 | 31 | 35 | 40 | 45 | 49 | 53.8 | 58.8 | 63.8 | 68.1 | 73.1 | |
| 1,000 pieces weigh kg | 65 | 75 | 100 | 162 | 212 | 317 | 415 | 499 | 628 | 771 | 998 | |