Specifications

Hexagon screw hard lock nuts 

made in Japan

This tension nut is used to tighten loose joints.
The nut completely covers the outer screw surface with a tight, compressed grip, creating strong, gripping friction on both sloping sides of the screw cap and eliminating any slackness.
Employing a tightening mechanism allows the part to be used on a wide range of devices.

A newly-developed lock nut. Not only does it prevent slack joints, but it also comprehensively resolves a range of problems such as slanting or internal shifting of the screw axis.

1. Benefits of circular connection: tapering and inner guide ring concavity enable this piece to create strong friction and grip very tightly compared to the typical tightness of male and female screws.

2. Covers the entire outer screw cap for strong surface coverage. The tapering creates pressure to adhere tightly in a perpendicular fashion to the inner axis of a male screw. By completely covering the outer slopes of the screw cap, the piece generates a tight friction bond and completely stops slippage.

3. Applies an even load to all sides of the screw cap. The nut evenly grips all sides of the male screw, ensuring that there will be no vibration. Further, because the grip is perpendicular and not derived through a spiraling connection with the screw axis, this piece restricts slanting and bending. The tapered edges create a tight fit that stays put when the screw axis moves.

4.High-speed screw slackening test
Test part: ZTEC lock nut M12 + 6-sided bolt M12x55 (Strength rating: 8.8)
Test type: Vibration test
Test method:
-Test piece was attached to test machine and tested on the following parameters
-If the piece did not slacken after 17 minutes, unwinding torque was measured
Test device: NS-format high-speed screw loosening test device
Vibration: 1780rpm
Vibration stroke: 11mm Impact stroke: 19mm
Vibration orientation: Perpendicular to bolt axis

(Test results)
Screwing torque: 5.5Nm Results: No slackening after 17 minutes Unwinding torque: 59.0Nm
*This test was conducted such that if the slightest slippage occurred in the bolt, washer, or nut, the test would end.

5.Pulling test
Test part: ZTEC lock nut M12 (piece used during vibration test),Six-sided bolt M12 (Strength rating: 10.9)
Maximum load trial: JIS B 1052 standard
Maximum load rating: 97.6kN Results: Bolt fractured

*Testing agency: Japan Quality Assurance Organization

For over a century, our firm has specialized in offering products to support Japan’s manufacturing industry. We strive to create stable, long-term business partnerships based on the extensive knowledge, service, and trust we have cultivated over the hundred years of our history.
With this foundation of trust, we are able to take in stock from over 1000 domestic manufacturers and can supply any and all Japanese-made parts. Raise the value of your company’s products with trusted Japanese parts and consider making us your partner in your ongoing development.

------------------ Corporate Information -------------------------

We are a trading company, specializing in machine tools, with a rich history dating back to 1910. We have 13 sales offices in Japan and a long history of customer confidence and supporting Japanese manufacturers. We provide our customers with high-quality, high-precision made-in-Japan cutting tools, machinery, and tooling from hundreds of Japanese manufacturers.

Our major clients include a variety of manufacturers, ranging from Mori Seiki and Mitsubishi Heavy Industries to automobile manufacturers, ship builders, construction companies, and infrastructure companies. We provide these clients with high-quality, made-in-Japan cutting tools, machine tools, and machine parts. Further, we also sell products, such as ZTEC Nuts and ZTEC Hammers, were developed within the company. ZTEC Nuts feature a strong locking structure, while ZTEC Hammers leave no dents or scratches.

We have over 5 years of experience exporting to Asian countries such as China, Thailand, Indonesia, and Malaysia, as well as the EU. In addition, we have ISO 9001 and ISO 14001 certification, reliable customer service, environmental-friendly operations, and we consistently provide fast response times and very high quality products.

Please feel free to contact us with any inquiries for products related to manufacturing industries such as machine tools, tooling, machine tool parts, and industrial machinery.

Company name IZUSHI CO.,LTD.

Address  518 Higashimonzencho Sanjoagaru Furukawachodori Sakyo-ku,kyoto-shi,Japan
Telephone number +81-6-6747-6181