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Locking Nut Product List and Ranking from 10 Manufacturers, Suppliers and Companies

Last Updated： Aggregation Period:Sep 17, 2025～Oct 14, 2025
This ranking is based on the number of page views on our site.

Locking Nut Manufacturer, Suppliers and Company Rankings

Last Updated： Aggregation Period:Sep 17, 2025～Oct 14, 2025
This ranking is based on the number of page views on our site.

  1. 株式会社冨士精密 Osaka//Machine elements and parts
  2. ハードロック工業 Osaka//Manufacturing and processing contract
  3. 大阪フォーミング Osaka//Machine elements and parts
  4. 4 紀州ファスナー Osaka//Other manufacturing
  5. 5 日本プララド Hyogo//Industrial Machinery
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Locking Nut Product ranking

Last Updated： Aggregation Period:Sep 17, 2025～Oct 14, 2025
This ranking is based on the number of page views on our site.

  1. Locking nut "FINE U-NUT" 株式会社冨士精密
  2. Locking nut "GU-NUT" compliant with JIS standards. 株式会社冨士精密
  3. Bearing Lock Nut "FINE U-NUT" 株式会社冨士精密
  4. Single unit locking nuts "U-NUT" "FINE U-NUT" 株式会社冨士精密
  5. 4 『U-NUT』『FINE U-NUT』『TWIN FU-NUT』 株式会社冨士精密

Locking Nut Product List

1～15 item / All 82 items

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The strongest locking nut "Bolrock Nut"

The strongest locking nut "Bolrock Nut"

A nut that does not loosen even after 1 million vibration tests (3D vertical and horizontal)! Compatible bolt sizes: M14 to M100.

■ Structure and Non-Loosening Principle of the Strongest Lock Nut "Bolrock Nut" 1. When the nut is subjected to vibration and attempts to loosen counterclockwise, the fine internal balls utilize a clutch mechanism to exhibit a wedging effect, preventing the nut from turning and loosening. 2. The slope angle of the internal balls is designed to be larger than the "screw lead angle," which is the angle at which the screw rises one full turn. 3. When the nut is tightened, the internal balls automatically move to the deepest part of the groove, aligning the bottom of the nut with the top of the balls, eliminating any gap between them and the floor, thus not affecting the tightening axial force. ■ Vibration Test Condition Data - Bolt Diameter: M16 - Bolt and Nut Material: SCM435 - Frequency: 100Hz - Number of Vibrations: 1,000,000 times - Simultaneous 3D vibration in both vertical and horizontal directions While competitor lock nuts loosen after 1,100 to 2,300 vibrations, the Plarad Bolrock Nut withstands 1,000,000 vibrations, proving its overwhelming vibration resistance. <About the Strongest Lock Nut: Bolrock Nut> For inquiries such as requests for quotes or materials, please contact us. (Company) Nippon Plarad TEL: 078-967-3556

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FLEXLOC locknut for aerospace applications

FLEXLOC locknut for aerospace applications

FLEXLOC locking nut for aerospace applications

Widely adopted from general industrial use to aircraft! All-metal (integrated metal molding) lock nut developed for aerospace applications. 【Features】 ○ Fully integrated all-metal structure combining the locking mechanism and nut ○ The gap between the male and female threads is filled over 360°, allowing for locking against any vibration ○ High strength of the nut allows for use with bolts of strength grades 8.8, 10.9, and 12.9 ○ Ideal for areas where previous locking products have failed to prevent loosening ○ Usable as a high-temperature joint or stop nut ○ Guaranteed for 15 reuses ○ Maximum operating temperature of 425°C

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"NEW" Achieves High Locking Performance - 'TRES LOCK NUT'

"NEW" Achieves High Locking Performance - 'TRES LOCK NUT'

With a stable screwing torque, workability improves, and tightening accuracy is also stable! Achieving ease of use and cost reduction! *Patent pending!

The "TRES LOCK NUT" improves workability with stable screwing torque, ensuring consistent tightening accuracy! Using the nut alone makes installation easy and prevents installation errors at the worksite. Thanks to its functional design that enables stable screwing torque, it reduces variations in tightening torque, making it easy to set and manage the tightening torque! 【Features】 ■ Made of all-metal, excellent in heat and cold resistance ■ Withstands impact and vibration tests, achieving high loosening prevention performance ■ Improved workability due to stable screwing torque 【Types】 ■ Hexagonal type ■ Flanged type ■ Type with dish spring 　Custom-made according to application!

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TRES LOCK Series - Flanged Nut Type with Cap

TRES LOCK Series - Flanged Nut Type with Cap

We offer a wide variety of specifications and sizes! Exceptional durability, providing safety and reliability.

This product is a flange nut with a locking feature. It has a structural design that minimizes variations in the screwing torque. It combines strong fastening power due to its wide seating surface with a stable locking function provided by a friction ring. The "TRES LOCK series" offers a wide variety of standards and sizes to meet various customer needs. 【Features】 ■ Locking feature included ■ Enhances safety by concealing the threaded part of the bolt ■ Excellent durability *For more details, please refer to the PDF document or feel free to contact us.

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TRES LOCK Series Bearing Nut Type

TRES LOCK Series Bearing Nut Type

Achieving ease of handling and cost reduction! We respond to various requests such as specifications and sizes.

The "Bearing Nut Type" not only achieves high loosening resistance but also ensures ease of use and low cost. It features a structural design that minimizes variation in screwing torque. To meet various customer needs, we offer a wide range of standards and sizes. 【Features】 ■ Achieves high loosening resistance ■ Ease of handling and cost reduction ■ Various standards and sizes available ■ Structural design that minimizes variation in screwing torque *For more details, please refer to the PDF document or feel free to contact us.

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TRES LOCK Series E-LOCK Nut Type

TRES LOCK Series E-LOCK Nut Type

Setting and managing tightening torque is easy! Ideal for places where vibrations occur, such as homes and trucks.

The "E-LOCK Nut Type" not only excels in anti-loosening performance but also boasts excellent durability. Thanks to its structural design that minimizes variations in screwing torque, setting and managing the tightening torque is easy. The TRES LOCK series is used in locations where vibrations may occur, leading to potential loosening of the fastening parts. 【Features】 ■ Achieves ease of use and cost reduction ■ Structural design that minimizes variations in screwing torque ■ Easy setting and management of tightening torque ■ Suitable for areas where loosening may occur *For more details, please refer to the PDF document or feel free to contact us.

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TRES LOCK Series - SMART Nut Type

TRES LOCK Series - SMART Nut Type

TRES LOCK series suitable for places where loosening occurs at fastening parts due to vibration.

The "SMART Nut Type" is a product that achieves high loosening prevention performance. It also excels in durability, providing safety and reliability in various vibration scenarios. The TRES LOCK series is available in a wide range of standards and sizes to meet various customer needs. 【Features】 ■ Achieves high loosening prevention performance ■ Structural design that minimizes variation in screw-in torque ■ Excellent durability ■ A rich variety of standards and sizes available *For more details, please refer to the PDF document or feel free to contact us.

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TRES LOCK Series: Repurposing TRES processing for various products.

TRES LOCK Series: Repurposing TRES processing for various products.

We will introduce TRES processing, which allows for the addition of a loosening prevention feature.

The "TRES processing" can minimize costs while adding a locking function without changing the conventional shape. The "TRES LOCK" is set according to JIS B 1056 for the pre-torquing torque, but it is also possible to change the set value. Initially, we will conduct a pre-torquing torque test and confirm the specified torque, and after verifying the locking performance using the NAS-type vibration testing machine, we will prepare a test result report as documentation. 【Features】 ■ Adds a locking function while maintaining the conventional shape ■ It is also possible to change the setting of the pre-torquing torque *For more details, please refer to the PDF document or feel free to contact us.

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TRES LOCK Series Plus a

TRES LOCK Series Plus a

Design registration application in progress! In addition to stable loosening prevention effects, it also supports screwing in.

The TRES LOCK series "Plus a" not only provides stable anti-loosening effects but also supports screwing in at 12 points. It has a high design quality and can be used as a visible fastening component. Slippage is reduced during screwing and tightening, allowing for stable torque management. Furthermore, it boasts excellent durability, providing safety and reliability in various vibration scenarios. 【Features】 ■ Reduces slippage during screwing and tightening ■ Allows for stable torque management ■ Prevents simple tampering as wrenches and spanners cannot be used ■ High design quality, can be used as a visible fastening component (dress-up part) *For more details, please refer to the PDF document or feel free to contact us.

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Achieve low cost! Locking nut 'TRES LOCK series'

Achieve low cost! Locking nut 'TRES LOCK series'

The structural design that suppresses variations in screw-in torque makes setting and managing the tightening torque easy!

Our in-house brand's anti-loosening nut, the "TRES LOCK series," not only boasts high anti-loosening performance but also achieves ease of use and low cost. The structural design minimizes variations in screwing torque, making it easy to set and manage tightening torque. To meet various customer demands, we offer a wide range of standards and sizes. Additionally, we provide "TRES processing," which adds anti-loosening functionality to existing fluid products, so please feel free to contact us. 【Features of the TRES LOCK series】 ■ Provides stable anti-loosening effect ■ Easy installation, preventing installation errors ■ Prevents early detachment even if the tightening axial force decreases ■ Suitable for tightening soft or easily damaged materials ■ All-metal products excel in heat and cold resistance ■ Stable screwing torque *For more details, please refer to the PDF document or feel free to contact us.

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[Technical Information] Why do screws loosen?

[Technical Information] Why do screws loosen?

Why do screws loosen? This explains the causes of screw loosening!

The loosening of screws is related to the decrease in fastening force (bolt axial force), and the causes can be broadly divided into two categories: "non-rotational loosening of screws" and "rotational loosening of screws." When the bolt axial force is low or decreases, the number of cycles until bolt failure decreases, leading to a very dangerous situation. In combination with measures against non-rotational loosening, our 'HLN Hard Lock Nut' exhibits a powerful anti-loosening effect based on the principle of wedging. Therefore, you can use it with confidence without worrying about a decrease in fastening force. [Causes of Screw Loosening] ■ Non-rotational loosening of screws - Initial settling - Indentation loosening - Loosening due to micro-motion wear, excessive tightening, and other external forces - Loosening due to thermal causes ■ Rotational loosening of screws *For more details, please refer to the PDF document or feel free to contact us.

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[Technical Information] Achieving anti-loosening effect based on the principle of "wedge."

[Technical Information] Achieving anti-loosening effect based on the principle of "wedge."

Applying the principle of a "wedge" to nuts! A hard lock nut recognized by the world.

The cause of loosening screws lies in the play (clearance) of the threads between the bolt and the nut, and if this can be completely eliminated, it would achieve the ideal anti-loosening effect. Our anti-loosening effect utilizes the "wedge," which has been used in wooden construction for a long time. We have conducted extensive research and developed a product that applies the principle of this "wedge" to nuts. That groundbreaking product is the 'HLN Hard Lock Nut.' 【Features of HLN Hard Lock Nut】 ■ Anti-loosening effect recognized worldwide ■ Torque and axial force management possible ■ Reusable ■ Easy and good workability ■ Contributes to significant cost reduction *For more details, please refer to the PDF document or feel free to contact us.

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[Technical Information] Troubles Caused by Loosening: What is Bolt Failure?

[Technical Information] Troubles Caused by Loosening: What is Bolt Failure?

Bolt damage/breakage occurs on the surface of the bolt, especially from the bottom of the thread groove where stress concentration is high!

The damage to screws and bolts can be broadly classified into three categories: "damage," "failure," and "fracture." Damage refers to the separation of a part of the material or the occurrence of permanent deformation, and it does not necessarily imply a hindrance to use. Failure refers to the separation of a part or the whole of the material or the occurrence of significantly large permanent deformation that renders it unusable, while fracture refers to the material breaking apart and separating. In other words, the damage/fracture of a bolt occurs on the surface of the bolt, particularly from the bottom of the thread valley where stress concentration is high. For a more detailed explanation, please refer to the related link page. 【Forms of Bolt Damage】 ■ Damage: Separation of a part of the material or occurrence of permanent deformation ■ Failure: Separation of a part or the whole of the material or occurrence of significantly large permanent deformation that renders it unusable ■ Fracture: Material breaks apart and separates *For more details, please refer to the PDF materials or feel free to contact us.

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[Technical Information] About the Principle of Loosening: Basic Edition

[Technical Information] About the Principle of Loosening: Basic Edition

A detailed explanation of "non-rotational looseness of the threaded part" and "looseness due to rotation of the threaded part"!

When physically defining the loosening of bolts and nuts, it can be defined as "a decrease in clamping force (bolt axial force)." So, what factors contribute to this decrease in clamping force? They can be broadly divided into two categories: "loosening due to non-rotation of the threaded part" and "loosening due to rotation of the threaded part." When considering anti-loosening measures, it is necessary to examine these two factors. In the products of Hard Lock Industries, development focuses on how to prevent loosening caused by the rotation of the threads, and they possess overwhelmingly superior anti-loosening characteristics. [External force factors of loosening due to thread rotation] 1. Axial direction of the bolt 2. Direction perpendicular to the bolt axis 3. Direction around the bolt axis *For more details, please refer to the PDF materials or feel free to contact us.

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[Technical Information] How to detect looseness? (NAS Test)

[Technical Information] How to detect looseness? (NAS Test)

Testing that emphasizes the impact of accelerated (decelerated) environments and high-temperature environments! Introducing NAS testing!

The NAS test refers to the accelerated vibration test described in the U.S. aerospace standards: NAS (NATIONAL AEROSPACE STANDARD) 3350/3354, which is commonly referred to as the NAS test. Since the test is based on the aviation industry, it emphasizes the effects of acceleration (deceleration) environments and high-temperature environments. At Hard Rock Industries, the "impact vibration test in accordance with NAS3350/3354" is referred to as the NAS test. Additionally, the U.S. aerospace standards primarily focus on heat-resistant alloys for the materials of applicable bolts and nuts, and specify the lubricants to be used, along with various other criteria. To properly conduct a NAS test, it is necessary to adhere to all these standards; however, for products intended for the Japanese market, tests that conform to the NAS test are generally conducted. *For more details, please refer to the PDF document or feel free to contact us.*

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