China Suppliers Factory DIN 980 Refined Hexagonal Locking Nut - Grade 4.8 to 12.9, Anti-Loosening Design
Product Introduction introduction
There are threaded holes drilled through the outer surface of the nut to the inner threaded surface (usually 2, distributed 90 degrees on the outer surface), which are used to screw in small diameter countersunk screws. The purpose is to apply a centripetal force to the thread to prevent the locking nut from loosening.
The high-quality locking nut sold in the market is embedded with a copper small piece on the inner circular surface of the nut that matches the thread of the locking nut, to avoid direct contact between the radial locking screw and the locked thread and damage to the latter. This type of locking nut is gradually being applied in shaft end locking situations of rotating motion parts, such as anti loosening of ball screw mounting end bearings.
A specialized locking nut needs to be used together with a locking gasket. The dedicated anti loosening nut is not a hexagonal nut, but a medium round nut with 3, 4, 6, or 8 notches on the circumference of the nut (depending on the size of the nut and the manufacturer's product series). These notches are not only the focus of tightening tools, but also the entry point of the anti loosening pad clamp.
Usage products
Lock nuts made of different metals can be applied to different temperature conditions; However, due to the deformation resistance of the metal material itself, the deformation of the all-metal nut is not easy to control, which will lead to a relatively large dispersion of the anti-loosening torque, which is easy to cause the assembly to be seized; In addition, after the assembly of this kind of lock nut, due to the effect of friction, it is easy to cause damage to the coating on the thread surface, which affects the anti-corrosion performance.
| Thread size | M3 | M4 | M5 | M6 | M7 | M8 | M10 | M12 | M14 | M16 |
|---|---|---|---|---|---|---|---|---|---|---|
| Pitch | 0.5 | 0.7 | 0.8 | 1 | 1 | 1.25 | 1.5 | 1.75 | 2 | 2 |
| Fine teeth | - | - | - | - | - | 1 | 1 | 1.5 | 1.5 | 1.5 |
| Fine teeth | - | - | - | - | - | - | 1.25 | 1.25 | - | - |
| minimum | 6.01 | 7.66 | 8.79 | 11.05 | 12.12 | 14.38 | 18.9 | 21.1 | 24.49 | 26.75 |
| Maximum = Nominal value | 3.7 | 4.2 | 5.1 | 6 | 7 | 8 | 10 | 12 | 14 | 16 |
| minimum | 3.4 | 3.9 | 4.8 | 5.7 | 6.5 | 7.5 | 9 | 11 | 12 | 14 |
| Maximum = Nominal value | 5.5 | 7 | 8 | 10 | 11 | 13 | 17 | 19 | 22 | 24 |
| minimum | 5.32 | 6.78 | 7.78 | 9.78 | 10.73 | 12.73 | 16.73 | 18.67 | 21.67 | 23.67 |
| Thread size | M18 | M20 | M22 | M24 | M27 | M30 | M33 | M36 | M39 |
|---|---|---|---|---|---|---|---|---|---|
| Pitch | 2.5 | 2.5 | 2.5 | 3 | 3 | 3.5 | 3.5 | 4 | 4 |
| Fine teeth | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 3 |
| Fine teeth | 1.5 | 1.5 | 1.5 | - | - | - | - | - | - |
| minimum | 29.56 | 32.95 | 35.03 | 39.55 | 45.2 | 50.85 | 55.37 | 60.79 | 66.44 |
| Maximum = Nominal value | 18 | 20 | 22 | 24 | 27 | 30 | 33 | 36 | 39 |
| minimum | 16 | 18 | 20 | 22 | 25 | 28 | 31 | 34 | 37 |
| Maximum = Nominal value | 27 | 30 | 32 | 36 | 41 | 46 | 50 | 55 | 60 |
| minimum | 26.16 | 29.16 | 31 | 35 | 40 | 45 | 49 | 53.8 | 58.8 |
Frequently Asked Questions FAQ
They are used to screw in small diameter countersunk screws to apply centripetal force to the thread, effectively preventing the locking nut from loosening.
The embedded copper piece prevents direct contact between the radial locking screw and the locked thread, protecting the locked thread from damage.
They are applied in shaft end locking situations of rotating motion parts, such as anti-loosening of ball screw mounting end bearings.
The notches (ranging from 3 to 8 notches) serve as the focus points for tightening tools as well as entry points for the anti-loosening pad clamp.
The assembly tool speed should not be too high, surface-treated lock nuts (such as galvanized or Dacromet) should be lubricated prior to use, and nuts should not be reused more than 5 times.
The all-metal lock nut can be reused, but it should not be installed more than 5 times.