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This section provides an overview for adapter nuts as well as their applications and principles. Also, please take a look at the list of 10 adapter nut manufacturers and their company rankings. Here are the top-ranked adapter nut companies as of October, 2026: 1.3M, 2.MurCal, 3.Nexus Modelling Supplies.
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Categories Related to Adapter Nuts
Adapter nuts are specialized components used in conjunction with adapter sleeves and lock washers, collectively known as adapters. These components are essential in the installation and maintenance of spherical ball bearings and spherical roller bearings, particularly those with tapered bores in their inner rings. Adapter nuts facilitate easy mounting, dismounting, and securing of these bearings.
These nuts, often synonymous with bearing nuts and lock nuts, feature a female thread on the inside diameter. The outside diameter is designed with 4 to 8 notches evenly spaced around the circumference, allowing for the use of specialized tools for tightening and loosening.
Adapter nuts are primarily used for securing the inner rings of spherical ball bearings and spherical roller bearings onto shafts. They are crucial in ensuring these bearings are fixed in position, which is particularly important in applications such as angular contact ball bearings. Here, adapter nuts, along with lock washers, are used to firmly attach the bearings to the shaft. Tightening and adjustments are typically done using a wrench with a special hook or a socket tool designed to fit the nut's notches.
The Adapter Nut functions by securing the bearing to the shaft. The adapter itself has a tapered outer diameter, with a smaller hole at the side where the nut is installed and a larger hole on the opposite side. The bearing's inner diameter also has a corresponding tapered hole. When the Adapter Nut is turned and tightened, it pushes the bearing's inner ring inward, tightening the fit between the adapter's outer diameter and the bearing's inner diameter, thus securing the bearing in place. A lock washer, positioned between the adapter nut and bearing inner ring, has outer teeth that align with the notches in the adapter nut. These teeth are bent into the notches to prevent the bearing from rotating or loosening.
*Including some distributors, etc.
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Weiler Abrasives, Inc, founded in Pforzheim, Germany., in 1879 is a manufacturer of coated abrasives, bonded abrasives and power brushes. The company's product portfolio includes Cutting Wheels, Grinding Wheels, Artificial Abrasives, Technical Fabrics and Superabrasives. Their products are used in industries such as Food and Beverage, Pharmaceutical and Biotechnology, Chemical and Petrochemical, Environmental Testing and healthcare. In 1886 the company moved its production site to its current location in Maribor in Slovenia.
SIGMAKOKI Co., Ltd. (SK) is a Japanese manufacturer and distributor of optical technology products founded in 1977. Headquartered in Tokyo, the company offers a wide range of optical equipment including optics and optical coatings, laser and optical application system components, objective lenses, and biomedical products such as core units for microscopy. It primarily serves research institutes, as well as clients in the aerospace, semiconductor, and medical device manufacturing sectors. SK products have various applications including in laser processing, R&D, spectroscopic measurement, and optical communication.
Ranking as of October 2026
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | 3M |
28.6%
|
| 2 | MurCal |
14.3%
|
| 3 | Nexus Modelling Supplies |
14.3%
|
| 4 | Just Engines |
14.3%
|
| 5 | G.W. Kent, Inc. |
14.3%
|
| 6 | SIGMAKOKI CO.,LTD. |
14.3%
|
Derivation Method
The ranking is calculated based on the click share within the adapter nut page as of October 2026. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
United States of America
|
3 | 37.5% |
|
Japan
|
2 | 25.0% |
|
United Kingdom
|
2 | 25.0% |
|
Slovenia
|
1 | 12.5% |
197 products found - Page 2
197 products - Page 2
Nikki Co., Ltd.
440+ people viewing
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10 models listed
Tatsuta Co., Ltd.
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■Features - Demonstrates anti-loosening performance that is resistant to vibration and high-speed rotation. - Loosening torque is much higher than ...
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■Features The set screw is oriented at 30 degrees to the axial direction, and is designed to be divided into 3 parts (equally distributed at 120 de...
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Reco Support Co., Ltd.
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■Dulimai Tech's precision lock nuts This is a precision lock nut that can be used not only as a general nut, but also in places with strict accurac...
Nikki Co., Ltd.
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Reco Support Co., Ltd.
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■Dulimai Tech's precision lock nuts This is a precision lock nut that can be used not only as a general nut, but also in places with strict accurac...
Nikki Co., Ltd.
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■Features The set screw is oriented at 30 degrees to the axial direction, and is designed to be divided into 3 parts (equally distributed at 120 de...
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Reco Support Co., Ltd.
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Nikki Co., Ltd.
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■Features By making a slit in the nut itself and tightening the cap bolt with an even torque, the threaded part of the shaft and the threaded part ...
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Reco Support Co., Ltd.
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■Dulimai Tech's precision lock nuts This is a precision lock nut that can be used not only as a general nut, but also in places with strict accurac...
Nikki Co., Ltd.
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■Features By using a special stainless steel set screw, it is now possible to tighten the set screw with high torque. By finishing the effective th...
6 models listed
Reco Support Co., Ltd.
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■Dulimai Tech's precision lock nuts This is a precision lock nut that can be used not only as a general nut, but also in places with strict accurac...
Nikki Co., Ltd.
530+ people viewing
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■Features For ball screw support bearings, the screw shaft and bearing can be fixed easily and accurately. *Other product numbers are available.
10 models listed
MacGuard Japan LLC
420+ people viewing
Last viewed: 1 minute ago
A one-car kit that includes a wheel lock nut compatible with many domestic cars and a rust-resistant tough nut. Available in two colors: chrome and...
MacGuard Japan LLC
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Last viewed: 2 minutes ago
A one-car kit that includes a wheel lock nut compatible with many domestic cars and a rust-resistant tough nut. Available in two colors: chrome and...
MacGuard Japan LLC
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This is a nut installation kit for American SUVs such as JEEP. This is a set for 1 car with 4 wheels plus a rear spare tire.
Global Parts Co., Ltd.
580+ people viewing
Last viewed: 10 minutes ago
The M-YSF lock nut is designed to tighten the shaft from three locations diagonally (30 degrees) to the thread. This superior tightening method pro...
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Global Parts Co., Ltd.
480+ people viewing
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YSA lock nuts are designed to tighten the shaft from three points in the axial direction, making them suitable for environments that require specia...
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Global Parts Co., Ltd.
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YSR lock nuts are designed to tighten the shaft from three points in the radial direction. This lock nut is thinner than other types, so it can be ...
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Global Parts Co., Ltd.
470+ people viewing
Last viewed: 14 hours ago
YSF lock nuts are designed to tighten the shaft from three locations diagonally (30 degrees) to the thread. This superior tightening method provide...
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Global Parts Co., Ltd.
510+ people viewing
Last viewed: 14 hours ago
M-YSA lock nuts are designed to tighten the shaft from three points in the axial direction, making them suitable for environments that require spec...
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Global Parts Co., Ltd.
510+ people viewing
Last viewed: 14 hours ago
The M-YSR lock nut tightens the shaft from three points in the radial direction. The thickness (h) of this lock nut is thinner than other types, so...
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TOCHIGIYA CO.,LTD.
560+ people viewing
Last viewed: 7 hours ago
■ Overview EMKA's quarter turns offer a wide variety of options, allowing you to freely combine basic inserts, housings, fasteners, and options to ...
