All-Metal Din980 Hexagonal Anti-Theft Nut - China Factory Supplier for Enhanced Security Solutions
Production Parameter
| Thread size d | M5 | M6 | M8 | M10 | M12 | (M14) | M16 | M20 | M24 | M30 | M36 | |
| P | pitch | 0.8 | 1 | 1.25 | 1.5 | 1.75 | 2 | 2 | 2.5 | 3 | 3.5 | 4 |
| da | Max | 5.75 | 6.75 | 8.75 | 10.8 | 13 | 15.1 | 17.3 | 21.6 | 25.9 | 32.4 | 38.9 |
| Min | 5 | 6 | 8 | 10 | 12 | 14 | 16 | 20 | 24 | 30 | 36 | |
| dw | Min | 6.88 | 8.88 | 11.63 | 14.63 | 16.63 | 19.64 | 22.49 | 27.7 | 33.25 | 42.75 | 51.11 |
| e | Min | 8.79 | 11.05 | 14.38 | 17.77 | 20.03 | 23.36 | 26.75 | 32.95 | 39.55 | 50.85 | 60.79 |
| h | Max | 5.1 | 6 | 8 | 10 | 13.3 | 14.1 | 16.4 | 20.3 | 23.9 | 30 | 36 |
| Min | 4.8 | 5.4 | 7.14 | 8.94 | 11.57 | 13.4 | 15.7 | 19 | 22.6 | 27.3 | 33.1 | |
| mw | Min | 3.52 | 3.92 | 5.15 | 6.43 | 8.3 | 9.68 | 11.28 | 13.52 | 16.16 | 19.44 | 23.52 |
| s | Max | 8 | 10 | 13 | 16 | 18 | 21 | 24 | 30 | 36 | 46 | 55 |
| Min | 7.78 | 9.78 | 12.73 | 15.73 | 17.73 | 20.67 | 23.67 | 29.16 | 35 | 45 | 53.8 | |
| Thousand piece weight (steel)≈kg | 1.32 | 2.42 | 5.25 | 9.89 | 15.29 | 24.17 | 36.56 | 65.54 | 112.8 | 229.7 | 39 | |
Production Description
Every year, China's mechanical sector suffers losses of up to billions of yuan in public facilities, property, and personal safety due to loose connections or human theft and damage, which has a significant impact on the healthy operation of the national economy. The anti-theft nut is formed in one step with a cold pier and does not require secondary processing. The surface is hot-dip galvanized. There is a pair of blind grooves on the internal thread, with a curved cross-section. The radial depth gradually increases in the opposite direction of the thread direction. The two blind grooves are equipped with two ball bearings and special plastic inner liners and washers to ensure that the ball bearings move freely. When tightening the nut clockwise, the ball rolls along the arc shaped blind groove, and the plastic inner liner of the nut will automatically come off. When loosening the nut counterclockwise, the radial size of the blind groove gradually decreases, and the ball is stuck in the thread, making it impossible to loosen the nut, thus playing a role in preventing theft. This model of anti-theft nut has been widely used in national power and signal towers, with convenient operation and strong anti-theft effect.
Frequently Asked Questions
Q How does the anti-theft mechanism of this nut work?
The nut features two internal blind grooves with ball bearings and a plastic liner. When tightened clockwise, the ball rolls freely. When turned counterclockwise to loosen, the groove's radial size decreases, wedging the ball into the thread and locking the nut in place.
Q What manufacturing process is used to produce the anti-theft nut?
The anti-theft nut is manufactured in a single step using a cold pier process, which eliminates the need for secondary processing and ensures highly consistent structure and strength.
Q What surface treatment is applied to these anti-theft nuts?
The surface of the anti-theft nut is treated with hot-dip galvanizing, providing excellent corrosion resistance and long-lasting durability in outdoor environments.
Q Where are these anti-theft nuts typically applied?
They are widely installed on national power transmission towers, telecommunication signal towers, and public infrastructure to prevent theft, vandalism, and loose connection hazards.
Q What is the purpose of the plastic inner liner and washers?
The special plastic inner liners and washers ensure that the internal ball bearings move freely during installation. Once tightened clockwise, the plastic inner liner automatically detaches.