Locking Nut Product List and Ranking from 9 Manufacturers, Suppliers and Companies | IPROS

Last Updated: Aggregation Period:Feb 04, 2026~Mar 03, 2026
This ranking is based on the number of page views on our site.

Locking Nut Manufacturer, Suppliers and Company Rankings

Last Updated: Aggregation Period:Feb 04, 2026~Mar 03, 2026
This ranking is based on the number of page views on our site.

  1. 大阪フォーミング Osaka//Building materials, supplies and fixtures manufacturers
  2. ハードロック工業 Osaka//others
  3. 西日本高速道路エンジニアリング関西 Osaka//Construction Consultant
  4. 株式会社冨士精密 Osaka//Building materials, supplies and fixtures manufacturers
  5. 5 東京衡機エンジニアリング Tokyo//Building materials, supplies and fixtures manufacturers

Locking Nut Product ranking

Last Updated: Aggregation Period:Feb 04, 2026~Mar 03, 2026
This ranking is based on the number of page views on our site.

  1. [NETIS Registration] Nut to Prevent Loosening *Product Sample Giveaway 大阪フォーミング
  2. [NETIS Registration] New mechanism's locking nut "NEW Lock Nut" 西日本高速道路エンジニアリング関西
  3. [Technical Information] Basic Knowledge of Understanding Looseness: What is Torque and Axial Force Management? ハードロック工業
  4. 4 Locking nut "Smart Hyper Road Nut" 東京衡機エンジニアリング
  5. 4 Locking nut, fixed to the base steel material 'Smart Insert Nut' 東京衡機エンジニアリング

Locking Nut Product List

1~30 item / All 67 items

Displayed results

The strongest lock 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 wedge 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 corresponds to one full turn of the screw. 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 vertical and horizontal directions While competitor lock nuts loosen after 1,100 to 2,300 vibrations, Plarad's Bolrock Nut has withstood 1,000,000 vibrations, proving its overwhelming vibration resistance. <About the Strongest Lock Nut: Bolrock Nut> For inquiries regarding quotes, requests for materials, etc., please contact us. (Company) Nippon Plarad TEL: 078-967-3556

  • Joining and fastening materials
  • Locking Nut

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"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 work site. 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】 ■ Hex type ■ Flange type ■ Type with dish spring  Custom made to suit various applications!

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TRES LOCK Series - Flanged Nut Type with Cap

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

This product is a flange nut with a locking feature. It has a structural design that minimizes variations in screwing torque. It combines strong fastening power due to its wide seating surface and stable locking functionality provided by the 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.

  • Safety Supplies
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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 variations 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 variations in screwing torque *For more details, please refer to the PDF document or feel free to contact us.

  • Safety Supplies
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TRES LOCK Series E-LOCK Nut Type

Setting and managing tightening torque is easy! Suitable 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 tightening torque, setting and managing the tightening torque is easy. The TRES LOCK series is used in locations where vibrations may occur, potentially leading to loosening at the fastening points. 【Features】 ■ Achieves ease of use and cost reduction ■ Structural design that minimizes variations in tightening torque ■ Easy setting and management of tightening torque ■ Suitable for locations where loosening may occur *For more details, please refer to the PDF document or feel free to contact us.

  • Safety Supplies
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TRES LOCK Series - SMART Nut Type

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

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 specifications and sizes to meet various customer needs. 【Features】 ■ Achieves high loosening prevention performance ■ Structural design that minimizes variations in screwing torque ■ Excellent durability ■ A wide variety of specifications and sizes available *For more details, please refer to the PDF document or feel free to contact us.

  • Safety Supplies
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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 ■ The setting of the pre-torquing torque can also be changed *For more details, please refer to the PDF document or feel free to contact us.

  • Safety Supplies
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TRES LOCK Series Plus a

Design registration application in progress! In addition to stable loosening prevention effects, it 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 aesthetic design 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 ■ Enables stable torque management ■ Prevents simple tampering as wrenches and spanners cannot be used ■ High aesthetic design allows it to 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"

The structural design that suppresses variations in the insertion torque makes it easy to set and manage the tightening torque!

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. Thanks to its structural design that minimizes variations in screwing torque, setting and managing the tightening torque has become simple. 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 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.

  • Other opening accessories (airtight materials around doors and windows, etc.)
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  • Locking Nut

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[Technical Information] Why do screws loosen?

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

The loosening of screws is related to a 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-movement 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."

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 the nut. That groundbreaking product is the 'HLN Hard Lock Nut.' 【Features of the 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 materials or feel free to contact us.

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

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

The damage to screws and bolts can be broadly categorized into three types: "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 indicate 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 separation of the material due to failure. In other words, damage or fracture of a bolt occurs on the surface of the bolt, particularly from the bottom of the thread valleys where stress concentration is high. For more detailed explanations, 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: Separation of the material due to failure *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

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 "the decrease in fastening force (bolt axial force)." So, what factors contribute to this decrease in fastening 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 methods to prevent loosening, 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, resulting in overwhelmingly superior anti-loosening characteristics. [External force factors for 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)

Testing that emphasizes the effects 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 known as the NAS test. Since the test is based on requirements for the aircraft industry, it emphasizes the effects of acceleration (deceleration) environments and high-temperature conditions. 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 specify that the materials for applicable bolts and nuts are primarily heat-resistant alloys, and the lubricants used are also specified, along with various other criteria. To properly conduct the NAS test, it is necessary to adhere to all of 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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[Technical Information] How to detect looseness? (Yunker Test)

Continuously measure changes in axial force! We will explain the principles of the Juncker test in detail!

The Junker axial perpendicular vibration test is a test for the loosening of screws caused by repeated loads in the axial perpendicular direction. The principle of the Junker test is illustrated in the left diagram. By applying repeated forces perpendicular to the axis of the screw, it generates a loosening torque, allowing for continuous measurement of changes in axial force. In actual usage scenarios of screws and bolts, vibrations occur regularly and are a primary cause of loosening. The Junker test machine artificially generates vibrations in the axial perpendicular direction, which are prone to cause a decrease in axial force, for observation and verification. *For more details, please refer to the PDF document or feel free to contact us.*

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Technical Information: Design of Fastened Joints

How should the bolts of a fastening assembly be designed? Here are some design methods.

The technical information site "Screw Fastening Technology Navigation," which contributes to solving issues related to screw fastening that our company operates, introduces the "design of screw fastening bodies." It explains the design methods for a bolt fastening body that connects two hollow cylinders with a single bolt and nut. We provide detailed explanations with diagrams and formulas on how to design the bolt to meet specific conditions and the design policies for each condition. Please take a look at the related links. [Contents] ■ How should the bolts of screw fastening bodies be designed? ■ What is the internal force coefficient Φ? *For more details, please feel free to contact us.

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[Technical Information] Basic Knowledge of Understanding Looseness: What is Torque and Axial Force Management?

How to determine the necessary tightening torque to manage the appropriate axial force! Introducing a simple calculation formula.

When fixing the joined components, the types of fastening screws include bolts and nuts. Axial force refers to the force that pulls the bolt in the axial direction when the bolt is tightened, causing the bolt tightening area to stretch slightly. The reactive force that attempts to return to its original state during this process is the axial force. If the axial force is not within the appropriate range, it can lead to loosening or cause the joined components to break, making daily management of proper tightening torque and axial force crucial. Now, to determine the necessary tightening torque for managing the appropriate axial force, it can be calculated using a simple formula. We provide detailed information on this in our technical information site "Screw Fastening Technology Navi," which contributes to solving screw fastening challenges, so please check it out through the related link. *For more details, please feel free to contact us.

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[Technical Information] Principle of Inclined Plane (in the case of a screw)

We will solve various issues related to agreements together with our users! Here, we introduce the principle of slopes in the case of angle screws.

In the tightening of screws, when torque is applied to the nut while the bolt is under axial force, the relationship between the bolt axial force and the torque applied to the nut is derived as an application of the "principle of the inclined plane." On our technical information site "Screw Fastening Technology Navi," which contributes to solving issues related to screw fastening, we provide detailed explanations of the principle of the inclined plane in the case of square screws, using diagrams and other materials. Please take a look from the related links. *For more details, feel free to contact us.

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[Technical Information] About "Mechanical Properties"

An overview of "mechanical properties," the general term for the mechanical characteristics possessed by metallic materials!

"Mechanical properties" refers to the collective term for the mechanical characteristics possessed by metallic materials, with tensile strength, elongation, reduction of area, hardness, and impact value being representative examples. Our technical information site, "Screw Fastening Technology Navi," which contributes to solving issues related to screw fastening, provides detailed information on typical mechanical properties using diagrams and tables. Please take a look through the related links. [Contents] ■ What are mechanical properties? - Tensile testing and stress-strain diagrams - Reduction of area, hardness, impact value - Relationship between tensile strength and hardness ■ Typical mechanical properties - Steel materials - Non-ferrous metals *For more details, please feel free to contact us.

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[Technical Information] About Steel Materials "Basic Edition"

Introduction to the basics of steel materials and heat treatment! Our company helps solve problems with a wide range of approaches.

The technical information site "Screw Fastening Technology Navi," which contributes to solving challenges in screw fastening that our company operates, introduces steel materials. As the basics of steel materials, it includes topics such as "the difference between ferrous and non-ferrous," "what carbon steel is," and "manufacturing methods," presented with diagrams and tables. Please take a look through the related links. 【Content Overview】 ■ Basics of Steel Materials  ・Difference between Ferrous and Non-Ferrous  ・What is Carbon Steel  ・Manufacturing Methods ■ About Heat Treatment  ・Basic Heat Treatment  ・Microstructural Changes Due to Heat Treatment ■ Major Steel Materials *For more details, please feel free to contact us.

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[Technical Information] Regarding Metal Damage: "Fatigue Fracture"

Evaluation of fatigue characteristics and concepts of fatigue strength safety design! Detailed introduction using diagrams.

Fatigue fracture is a failure phenomenon that occurs suddenly and without warning under conditions where a constant load is applied repeatedly, and it can also occur with variable loads. On our technical information site "Screw Fastening Technology Navigation," which contributes to solving issues related to screw fastening, we provide detailed information about metal damage known as "fatigue fracture." Please take a look through the related links. [Contents] ■ What is fatigue fracture? - Evaluation of fatigue characteristics - Factors that change fatigue characteristics - Fatigue mechanisms ■ Characteristic fracture surfaces of fatigue fracture - Beach marks - Striation patterns ■ Concepts of fatigue strength safety design *For more details, please feel free to contact us.

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Locking nut "SU-NUT"

Locking nut + theft prevention + tamper-proof nut

"SU-NUT" is a safety and security lock nut adopted in outdoor facilities such as mega-solar plants. Recently, we have received inquiries to protect equipment from theft and natural disasters at important facilities around the world, including the mega-solar plants being built across the country. The "SU-NUT" features a unique design that enhances visual security deterrence while requiring a special socket for installation and removal, making it impossible to use standard sockets or wrenches. The management of the special socket is handled by Fuji Precision Co., Ltd., and we provide it for free to customers after signing a "memorandum." 【Features】 - Protects your valuable assets - Equivalent functionality and quality to U-NUT - Simply replace the nuts you are currently using - Easy to use, requiring only a special socket as a tool For more details, please contact us or download the catalog.

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Locking nut "BLU-NUT"

Locking function + one-sided fastening method nut

"BLU-NUT" is a research and development product that incorporates the functionality of a U-NUT into a blind nut. Based on feedback from everyone, we have integrated Fujiseimitsu Co., Ltd.'s U-NUT technology into the blind nut. We believe that this "BLU-NUT" will lead to further improvements in our customers' work efficiency and cost management. 【Features】 ○ Reduces the time and effort required for complicated pre-process tasks ○ Simple operation that can be tightened with a riveter or nut driver ○ Contributes to overall cost reduction ○ Reduces the number of parts, making management easier ○ Equipped with measures to prevent nut rotation and bolt seizure For more details, please contact us or download the catalog.

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Locking nut "Small U-NUT"

To reduce the workspace! Tools can be shared, making work more efficient.

The "Small U-NUT" is a nut that has a width across two opposite faces that is one rank smaller than that of a standard nut for the same nominal diameter. This product allows for weight reduction of the nut. Additionally, it enables a reduction in workspace. Furthermore, it allows for the sharing of tools, contributing to increased work efficiency. 【Features】 ■ Width across two opposite faces is one rank smaller than that of a standard nut for the same nominal diameter ■ Weight reduction of the nut ■ Reduction in workspace ■ Tools can be shared ■ Increased work efficiency *For more details, please refer to the PDF document or feel free to contact us.

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Locking nut "Flange U-NUT"

Reduce the process of fitting washers! Improve aesthetics with a design integrated with the flange.

The "Flange U-NUT" is a locking nut that reduces the process of fitting washers, thereby improving work efficiency. This product helps reduce management supplies. Additionally, the seating surface is stable, and fastening performance is enhanced. The integrated design with the flange improves aesthetics. 【Features】 ■ Increases work efficiency ■ Reduces management supplies ■ Stable seating surface ■ Enhanced fastening performance ■ Integrated design with flange *For more details, please refer to the PDF document or feel free to contact us.

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Locking nut "Weld U-NUT"

Fastening by screwing in the bolt! Projection type nut.

The "Weld U-NUT" is a projection-type nut. It is fastened by screwing in a bolt. There are examples of its use in automotive armrests, automotive seat frames, and motorcycle center stands. 【Specifications (excerpt)】 ■ Nominal diameter (d): M5 ■ Pitch (p): 0.8 ■ Width across flats (s): Standard dimension/9, Tolerance/0-0.36 ■ Overall height (h): Standard dimension/3.0, Tolerance/±0.3 ■ Thread height (m): Approximately 2.3 ■ Weight (g): Approximately 1.2 *For more details, please refer to the PDF document or feel free to contact us.

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Locking nut "Wit U-NUT"

Compatible with the old British standards commonly used in construction and plumbing!

The "Wit U-NUT" is a lock nut with a thread angle of 55°. It complies with the old British standards commonly used in construction and plumbing. Additionally, we also offer the "Unify U-NUT," which meets the standards of the United States, the United Kingdom, and Canada. 【Features】 ■ Thread angle is 55° ■ Complies with the old British standards commonly used in construction and plumbing *For more details, please refer to the PDF document or feel free to contact us.

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HEX U-Nut adopted for Tokyo Skytree

U-NUT (stainless steel) is used in the curtain wall of Tokyo Skytree.

The U-NUT, synonymous with locking nuts, continues to evolve not only in terms of its locking performance but also in durability and vibration resistance. Here are some examples of the U-NUT locking nut being implemented. 【Case Overview】 ■ Application Location - Tokyo Skytree (Curtain Wall) ■ Product Used - HEX U-Nut (Stainless Steel) ■ Reasons for Adoption - Locking function, simplification of on-site construction, reduction in the number of components ■ Other Features - Can be fastened in limited spaces *For more details, please refer to the PDF document or feel free to contact us.

  • Earthquake-proof and vibration-damping equipment
  • Locking Nut

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Adoption of 'HEX U-Nut' in hydraulic excavators

U-NUT treated with S45C is used in the caterpillar of hydraulic excavators.

The U-NUT, synonymous with locking nuts, continues to evolve not only in its locking performance but also in terms of durability and vibration resistance. Here are some examples of the U-NUT locking nut being implemented. 【Case Overview】 ■ Adoption Location - Hydraulic Excavator (Caterpillar) ■ Adopted Product - HEX U-Nut (S45C) ■ Reason for Adoption - Locking function ■ Other Features - High strength and excellent availability *For more details, please refer to the PDF document or feel free to contact us.

  • Earthquake-proof and vibration-damping equipment
  • Locking Nut

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Single lock nut for securing auxiliary facilities (old registration)

By introducing the standalone locking nut "U-NUT," we have confirmed an improvement in fastening work efficiency, contributing to a reduction in construction days and maintenance costs!

"U-NUT" is a locking nut that excels in various industries, from railway and bridge steel structures to cars, motorcycles, and industrial machinery. No matter how harsh the usage environment, this product, which demands safety and reliability, continues to evolve not only in its locking performance but also in durability and vibration resistance. 【Features】 ■ Fastening Function: Provides stable locking performance ■ Drop Prevention: Prevents early drop even when axial force decreases ■ Reusability: Can be reused ■ Easy Fastening: No need for skilled techniques or specialized tools ■ Standalone Component: Simplifies parts management and prevents installation errors ■ Heat and Cold Resistance: All-metal product with excellent heat and cold resistance *NETIS Registration No. KT-130064-VE New Technology Name "U-Nut" 【Customer Feedback】 By using U-NUT for securing shackles, we were able to eliminate the need for the traditional process of crushing screw threads, confirming improved fastening work efficiency. This led to a reduction in construction days and maintenance costs. *For more details about "U-NUT," please download the PDF or feel free to contact us.

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  • Locking Nut

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