Washer Product List and Ranking from 19 Manufacturers, Suppliers and Companies

Last Updated： Aggregation Period:Oct 15, 2025～Nov 11, 2025
This ranking is based on the number of page views on our site.

Washer Manufacturer, Suppliers and Company Rankings

Last Updated： Aggregation Period:Oct 15, 2025～Nov 11, 2025
This ranking is based on the number of page views on our site.

  1. null/null
  2. サンワ・アイ Osaka//others
  3. アマテイ Hyogo//Building materials, supplies and fixtures manufacturers
  4. 4 ヤマザキアクティブ Nagano//Service Industry
  5. 4 和光金属工業 Osaka//Service Industry
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Washer Product ranking

Last Updated： Aggregation Period:Oct 15, 2025～Nov 11, 2025
This ranking is based on the number of page views on our site.

  1. Washer "Screw Washer (Zaboresu)"
  2. Omega Round Washer 58 for M12 Anchor Bolt
  3. Omega Round Washer 70 II for M12 Anchor Bolt
  4. 4 Omega Shrink Washer
  5. 5 Seal washer <Prevention of gas and liquid leakage> サンワ・アイ

Washer Product List

31～38 item / All 38 items

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The joint for wooden construction uses vibration-resistant and non-loosening washers [Titanic].

The joint for wooden construction uses vibration-resistant and non-loosening washers [Titanic].

Can be used for medium to large-scale wooden structures. Strong against vibrations! Easy to install! No need for re-tightening! Seismic-resistant washer "Titanic" compatible with various joints.

"Titanic" converts the vibrations at the joints into a tightening force using the patented technology "Magic Ring." It does not loosen even under continuous vibrations. 【Features】 - Converts vibrations into a tightening force with the Magic Ring - Follows the wood's natural movement, eliminating the need for re-tightening - Reduces the swaying of houses during earthquakes, vehicle vibrations, and typhoon winds - Withstands large forces with a light tightening force - Available in types suitable for outdoor use You can see examples of its use in large-scale wooden structures at the joints. *For more details, please refer to the PDF materials or feel free to contact us.

  • Other store equipment and supplies
  • Safety and consumables
  • Earthquake-resistant construction method

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Backup washer for preventing supply rotation.

Backup washer for preventing supply rotation.

A simple way to eliminate supply chain issues! Work time can be reduced depending on the site conditions.

The "Backup Washer" is a product that eliminates the need for a backup wrench simply by placing it under the nut, just like a regular washer. When using this product for bolt tightening, there is no need to use a backup wrench. Safety risks, such as pinching fingers, are eliminated. 【Features】 ■ No backup wrench required ■ Reduced working time ■ Cost-effective *For more details, please refer to the related links or feel free to contact us.

  • Work tools

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Flat seat gold 300HV <JIS B 1256:2008 standard>

Flat seat gold 300HV <JIS B 1256:2008 standard>

Material uses S45C to S55C (domestic material)! It is recommended to combine with screw part strength classification 10.9.

We would like to introduce the "Flat Washer 300HV" handled by Sanwa Ai. It prevents the nut or bolt head from sinking into the joined material. When the hole diameter is larger than the bolt diameter, it can be used to stabilize the seating surface. The material used is S45C to S55C (domestic material), and it undergoes bright quenching and tempering heat treatment. 【Features】 ■ JIS B 1256:2008 ■ Recommended for use in combination with screw part strength classification 10.9 (JIS B 1061:2020) ■ Marked with hardness classification 300HV ■ Can provide mill sheets and inspection certificates *For more details, please refer to the PDF materials or feel free to contact us.

  • Safety and consumables

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Flat seat gold 300HV <Avoiding the risk of sinking during bolt fastening>

Flat seat gold 300HV <Avoiding the risk of sinking during bolt fastening>

Marked with a hardness classification of 300HV! It is recommended to combine with screw component strength classification 10.9.

We handle the "Flat Washer 300HV" to avoid the risk of sinking during bolt fastening. This product prevents sinking of the bolt seating surface, which is a cause of loosening of bolts and nuts, and can be used to stabilize the seating surface when the hole diameter is larger than the bolt diameter. The material used is S45C to S55C (domestic material), and it undergoes bright hardening and tempering heat treatment. 【Features】 ■ JIS B 1256:2008 ■ Recommended for combination with screw part strength classification 10.9 (JIS B 1061:2020) ■ Marked with hardness classification 300HV ■ Can provide mill sheets and inspection certificates *For more details, please refer to the PDF document or feel free to contact us.

  • Safety and consumables

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Seal washer <compatible with water, oil, and air>

Seal washer <compatible with water, oil, and air>

For preventing gas and liquid leaks! A washer that can handle water, oil, and air, and can maintain a pressure of 200 atmospheres (20 MPa).

At Sanwa Ai, we handle "Seal Washers." This is a set product that incorporates a rubber packing into a metal-formed bowl-shaped washer. The rubber packing is press-fitted onto the threaded part of the bolt, sealing the fluid at the side. Additionally, this product has passed a pressure test of 200 atmospheres (20 MPa). Please feel free to contact us when you need assistance. 【Features】 - Suitable for preventing gas and liquid leakage - Passed a pressure test of 200 atmospheres (20 MPa) - Demonstrates sufficient performance even when used directly on the surfaces of black steel and cast iron - Vibration damping and soundproofing effects - The metal and rubber packing do not resonate with vibrations *For more details, please refer to the PDF materials or feel free to contact us.

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  • Safety and consumables

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Seal washer <Prevention of gas and liquid leakage>

Seal washer <Prevention of gas and liquid leakage>

The design makes it difficult for the rubber to protrude even when tightening to the appropriate torque! It seals the fluid on the side.

At Sanwa Ai, we handle "seal washers." This is a set product that incorporates a rubber packing into a metal-formed bowl-shaped washer. The rubber packing is press-fitted onto the threaded part of the bolt, sealing fluids at the side. Designed to minimize rubber overflow even under proper torque tightening, we use SUS304, which is resistant to rust, as the standard material, and offer packings made of NBR (standard specification), silicone, fluororubber, and EPDM. 【Features】 - Suitable for preventing gas and liquid leakage - Passed pressure tests of 200 atmospheres (20 MPa) - Provides sufficient performance even when used directly on the surfaces of black steel and cast iron - Vibration damping and soundproofing effects - Metal and rubber packing do not resonate with vibrations *For more details, please refer to the PDF materials or feel free to contact us.

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  • Safety and consumables

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Seal washer <capable of sealing fluids strongly>

Seal washer <capable of sealing fluids strongly>

Introducing a washer that strongly seals fluids with a rubber packing that deeply embeds into the threaded part of the bolt!

At Sanwa Ai, we handle "seal washers." This is a set product that incorporates a rubber packing into a metal-formed bowl-shaped washer. The rubber packing is press-fitted onto the threaded part of the bolt, sealing the fluid at the side. We use SUS304, which is resistant to rust, as the standard material, and we offer packings made of NBR (standard specification), silicone, fluororubber, and EPDM. 【Features】 ■ Suitable for preventing gas and liquid leakage ■ Passed pressure tests at 200 atmospheres (20 MPa) ■ Demonstrates sufficient performance even when used directly on the surface of black steel and cast iron ■ Vibration-damping and sound-absorbing effects ■ Metal and rubber packing do not resonate with vibrations *For more details, please refer to the PDF materials or feel free to contact us.

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  • Safety and consumables

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Non-loosening seismic seat cushion that follows wood shrinkage【Titanic】

Non-loosening seismic seat cushion that follows wood shrinkage【Titanic】

Seismic seat "Titanic" that prevents the decrease in seismic strength due to wood shrinkage. No need for additional tightening! Easy to install! Strong against vibrations!

"Taitonic" is a washer that follows wood shrinkage and does not loosen. It adapts to wood shrinkage with internal springs and tightens using the "wedge" effect of the magic ring. The seismic performance of a house is based on the premise that structural joints are firmly connected. "Taitonic" does not degrade the inherent seismic performance of the house. Additionally, "Taitonic" converts the vibrations acting on the house into a tightening force with the magic ring. This means it does not loosen not only during earthquakes but also from continuous vibrations such as those caused by typhoons or road traffic. 【Features】 ■ Tightens in response to wood shrinkage ■ Converts vibrations into a tightening force with the magic ring ■ Makes it difficult for the house to sway from earthquakes, vehicle vibrations, or typhoon winds ■ Withstands large forces with light tightening force *For more details, please refer to the PDF document or feel free to contact us.

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  • Safety and consumables
  • Earthquake-resistant construction method

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