Anti-rotation washer that absolutely prevents the bolt from rotating together - zero friction washer.
Anti-rotation and zero-twist washer
Washer for completely preventing the simultaneous rotation of bolts, suitable for M12 to M72.
■ Completely prevents bolt rotation with the "Anti-Rotation Zero Friction Washer" Bolt sizes: Compatible with M12 to M72. International patent applied for. ■ Features of the Plarad Anti-Rotation Zero Friction Washer Prevents hex bolt rotation. ■ Unlike washers that utilize surface irregularities from knurled processing for friction resistance, the Zero Rotation Washer has a special structure that changes the equivalent friction diameter, ensuring that the bolt does not rotate. ■ By simply replacing standard flat washers, there is no need for cumbersome bolt anti-rotation tools or backup wrench tools, significantly reducing the time required for bolt tightening operations. Additionally, the bolt tightening task, which previously required two workers to hold the tightening tool and the anti-rotation tool, can now be done by one person, improving labor efficiency. - Strength classification: 8.8 - Material: S45C - Surface treatment: Trivalent chromate finish <For inquiries about the bolt anti-rotation Zero Friction Washer> Please contact us for quotes and information requests. Plarad Co., Ltd. TEL: 078-967-3556
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basic information
■ Usage Precautions - To prevent counter-rotation, always install the product on the opposite side of the tightening side. - In the case of nuts on both sides: please install and use it on the opposite side of the nut being tightened. - It is a requirement that the nut is hand-tightened until it is seated on the floor surface. The counter-rotation function will start once the nut is seated on the floor surface.
Price range
Delivery Time
※The delivery time may vary depending on the quantity, so please feel free to contact us.
Applications/Examples of results
For all bolts struggling with bolt rotation. Related to transportation equipment, plant-related, shipbuilding heavy machinery, steel-related, power-related, construction-related, electrical equipment-related, facility-related, railway equipment, vehicle-related, industrial machine tools, etc.
Detailed information
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To prevent rotation, please set a zero washer on the opposite side of the tightening side for use. It is a requirement that the nut is hand-tightened until it sits flush with the floor surface. The anti-rotation function will start once the nut is seated on the floor surface.
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Photo of the installation of the bolt anti-rotation "Ture Zero Washer."
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The principle of the bolt anti-rotation "Zero Friction Washer."
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Supply return prevention washer / zero-twist washer
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It can be reused multiple times.
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Company information
Plarad is a specialized manufacturer of hydraulic torque wrenches, boasting the oldest history and tradition in the world (since 1962). The design and manufacturing of all hydraulic torque wrenches began with Plarad. As a pioneer, it has developed many patented technologies and high-precision hydraulic torque wrenches, electric torque wrenches, air torque wrenches, and bolt tensioners specifically for large bolt tightening, which are used in various industrial sectors worldwide. It offers a lineup of tools ranging from 50 Nm to one of the largest tightening torques in the world at 500,000 Nm. - Awarded the Germany TOP 100 Innovators Award. - As a leading company in hydraulic torque wrenches and bolt tensioners, it supplies hydraulic tools for large bolt fastening systems capable of torque management and axial force management to Japan and the world. - Engaged in manufacturing, sales, and rental business. - Plarad hydraulic torque wrenches have numerous delivery records, including the Tokyo Skytree, Abeno Harukas, the world's largest shield machine, the world's largest wind turbine at 8.0 MW, the world's longest high-speed tunnel, the linear Shinkansen, Boeing 787, and JAXA Tanegashima Space Center. - Certified with international standards ISO 9001 and ISO 14001.