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

Last Updated：Oct 22, 2025 Aggregation Period:Sep 24, 2025～Oct 21, 2025
This ranking is based on the number of page views on our site.

Locking Nut Manufacturer, Suppliers and Company Rankings

Last Updated：Oct 22, 2025 Aggregation Period:Sep 24, 2025～Oct 21, 2025
This ranking is based on the number of page views on our site.

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

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Locking Nut Product ranking

Last Updated：Oct 22, 2025 Aggregation Period:Sep 24, 2025～Oct 21, 2025
This ranking is based on the number of page views on our site.

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

Locking Nut Product List

16～30 item / All 82 items

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

Continuously measure changes in axial force! We will explain the principles of the Junker 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 in the perpendicular direction to the axis of the screw, a loosening torque is generated, and the changes in axial force are continuously measured. In actual usage scenarios of screws and bolts, vibrations occur regularly and are a primary cause of loosening. The Junker testing machine artificially generates vibrations in the axial perpendicular direction, which are prone to cause a decrease in axial force, allowing for observation and verification. *For more details, please refer to the PDF materials or feel free to contact us.*

Company：ハードロック工業
Price：Other

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Technical Information: Design of Fastened Joints

How should the bolts of a fastening assembly be designed? Here, we will introduce the 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." We explain 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 through the related links. [Content Included] ■ How should bolts for screw fastening bodies be designed? ■ What is the internal force coefficient Φ? *For more details, please feel free to contact us.

Company：ハードロック工業
Price：Other

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

How to determine the tightening torque necessary 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 occurs when a bolt is tightened; the bolt tightening area is pulled in the axial direction and stretches very slightly. The reactive force that tries to return it to its original state is the axial force. If the axial force is not within the appropriate range, it can cause loosening or lead to the destruction of the joined components, making daily management of proper tightening torque and axial force important. 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 topic on our technical information site, "Screw Fastening Technology Navigation," which contributes to solving screw fastening challenges. Please check it out through the related link. *For more details, please feel free to contact us.

Company：ハードロック工業
Price：Other

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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 corner screws.

In the tightening of screws, when torque is applied to the nut while the bolt is in a state of 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 through the related links. *For more details, feel free to contact us.

Company：ハードロック工業
Price：Other

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[Technical Information] Regarding "Mechanical Properties"

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

"Mechanical properties" refer to the collective 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 addresses challenges in screw fastening, provides detailed information on representative mechanical properties using diagrams and tables. Please take a look through the related links. [Contents] ■ What are mechanical properties - Tensile tests and stress-strain diagrams - Reduction of area, hardness, impact value - Relationship between tensile strength and hardness ■ Representative mechanical properties - Steel materials - Non-ferrous metals *For more details, please feel free to contact us.

Company：ハードロック工業
Price：Other

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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 issues related to screw fastening that our company operates, introduces steel materials. As the basics of steel materials, it covers topics such as "the difference between steel and non-ferrous metals," "what carbon steel is," and "manufacturing methods," using diagrams and tables. Please take a look through the related links. 【Content Included】 ■ Basics of Steel Materials - Difference between Steel and Non-Ferrous Metals - What is Carbon Steel - Manufacturing Methods ■ About Heat Treatment - Basic Heat Treatment - Structural Changes Due to Heat Treatment ■ Major Steel Materials *For more details, please feel free to contact us.

Company：ハードロック工業
Price：Other

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

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

Fatigue failure is a destructive 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 failure." Please take a look through the related links. [Contents] ■ What is fatigue failure? - Evaluation of fatigue characteristics - Factors that change fatigue characteristics - Fatigue mechanisms ■ Characteristic fracture surfaces of fatigue failure - Beach marks - Striation patterns ■ Considerations for fatigue strength safety design *For more details, please feel free to contact us.

Company：ハードロック工業
Price：Other

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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 power plants. Recently, we have received inquiries to protect equipment from theft and natural disasters at important facilities around the world, including mega-solar power plants being built across the country. The "SU-NUT" features a unique design that enhances visual security deterrence while being impossible to remove with commercially available sockets or wrenches; a dedicated socket is required. The management of the dedicated sockets is handled by Fuji Precision Co., Ltd., and we lend them out for free after signing a "memorandum" with our customers. 【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.

Company：株式会社冨士精密
Price：Other

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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 total 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.

Company：株式会社冨士精密
Price：Other

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Locking nut "Small U-NUT"

For reducing the workspace! Tools can be shared, making work more efficient.

The "Small U-NUT" is a nut with a width across the flats that is one rank smaller than a standard nut for the same nominal diameter. This product allows for weight reduction of the nut. Additionally, it helps to minimize the working space. Furthermore, it enables the use of shared tools, contributing to increased work efficiency. 【Features】 ■ Width across the flats is one rank smaller than a standard nut for the same nominal diameter ■ Weight reduction of the nut ■ Minimization of working space ■ Shared tools can be used ■ Increased work efficiency *For more details, please refer to the PDF materials or feel free to contact us.

Company：株式会社冨士精密
Price：Other

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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.

Company：株式会社冨士精密
Price：Other

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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.

Company：株式会社冨士精密
Price：Other

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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.

Company：株式会社冨士精密
Price：Other

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[Fine U-Nut Delivery Case] Electrical Equipment

No need for keyway machining on the shaft, washers, or installation techniques! Examples of delivered locking nuts!

The "Fine U-Nut" allows for arbitrary and appropriate positioning, making torque management easy. Furthermore, it is a revolutionary locking nut for bearings that eliminates the need for keyway machining on shafts, washers, and installation techniques. It improves the rotational balance of bearings, generating power in various machinery industries. This product is also used in electrical applications and has been supplied as a component for semiconductor automatic sealing devices. 【Features】 ■ Allows for arbitrary and appropriate positioning ■ Easy torque management ■ Improves the rotational balance of bearings *For more details, please refer to the PDF materials or feel free to contact us. *CAD data is also available for download.

Company：株式会社冨士精密
Price：Other

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[Fine U-Nut Delivery Case] Industrial Robot

Keyway machining for shafts, washers, and no installation technology required! Examples of delivered locking nuts!

The "Fine U-Nut" allows for arbitrary and precise positioning and makes torque management easy. Furthermore, it is a revolutionary locking nut for bearings that eliminates the need for keyway machining on shafts, washers, and installation techniques. It improves the rotational balance of bearings that generate power in various machinery industries. This product is also used in industrial robots, with examples of being supplied as parts for welding robots, small molded part extraction robots, and automotive welding robots. 【Features】 ■ Arbitrary and precise positioning possible ■ Easy torque management ■ Improves the rotational balance of bearings * For more details, please refer to the PDF document or feel free to contact us. * CAD data is also available for download.