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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 April, 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 April 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 April 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% |
207 products found - Page 2
207 products - Page 2
Nikki Co., Ltd.
250+ people viewing
Last viewed: 3 hours ago
■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...
10 models listed
Nikki Co., Ltd.
200+ people viewing
Last viewed: 5 hours ago
■Features The set screw is perpendicular to the axial direction, and is designed to be divided into 3 parts (equally spaced at 120 degrees). This i...
10 models listed
Reco Support Co., Ltd.
380+ people viewing
■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.
200+ people viewing
Last viewed: 14 hours ago
■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...
10 models listed
Reco Support Co., Ltd.
350+ people viewing
Last viewed: 15 hours ago
■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.
240+ people viewing
Last viewed: 19 hours ago
■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...
10 models listed
Reco Support Co., Ltd.
420+ people viewing
Last viewed: 17 hours ago
■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.
250+ people viewing
Last viewed: 21 hours ago
■Features The set screw is perpendicular to the axial direction, and is designed to be divided into 3 parts (equally spaced at 120 degrees). This i...
10 models listed
Reco Support Co., Ltd.
370+ people viewing
Last viewed: 1 day ago
■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...
Reco Support Co., Ltd.
390+ people viewing
Last viewed: 5 hours ago
■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...
Reco Support Co., Ltd.
420+ people viewing
■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...
Reco Support Co., Ltd.
400+ people viewing
Last viewed: 7 hours ago
■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...
Reco Support Co., Ltd.
480+ people viewing
Last viewed: 22 hours ago
■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...
Tatsuta Co., Ltd.
490+ people viewing
Last viewed: 13 hours ago
■Features - Demonstrates anti-loosening performance that is resistant to vibration and high-speed rotation. - Loosening torque is much higher than ...
Tatsuta Co., Ltd.
400+ people viewing
■Features ・Fix 3 set screws at 30° from the circumferential direction. ・Pin spanner type. █Applications Precision spindles for machine tools, ba...
Tatsuta Co., Ltd.
380+ people viewing
Last viewed: 13 hours ago
■Features ・Fix 3 set screws at 60° from the circumferential direction. - 3 hook spanner grooves.
Tatsuta Co., Ltd.
430+ people viewing
Last viewed: 13 hours ago
■Features ・Fix 3 set screws at 60° from the circumferential direction. - 4 hook spanner grooves. ・With 2-chamfer processing (M80 or less). █Appl...
Tatsuta Co., Ltd.
380+ people viewing
Last viewed: 22 hours ago
■Features - Axial force and preload can be easily adjusted. - Resistant to vibration, allows for precision adjustment and strong fastening. █Appli...
Tatsuta Co., Ltd.
410+ people viewing
Last viewed: 20 hours ago
■Features ・Fix 3 set screws from the axial direction. ・Pin spanner type.
Tatsuta Co., Ltd.
390+ people viewing
■Features ・Fix from the circumferential direction with 3 set screws (2 for M17 and below). ・Hook spanner type. ■Applications Precision spindles ...
Tatsuta Co., Ltd.
400+ people viewing
Last viewed: 22 hours ago
■Features ・Fix from the circumferential direction with 3 set screws (2 for M17 and below). - 3 hook spanner grooves.
Tatsuta Co., Ltd.
500+ people viewing
Last viewed: 16 hours ago
■Features ・Fix from the circumferential direction with 3 set screws (2 for M17 and below). - 4 hook spanner grooves. ■Applications Precision spin...
TOCHIGIYA CO.,LTD.
390+ people viewing
Last viewed: 8 hours ago
■Features A welding nut that doubles as a spacer and is suitable for fixing equipment mounting bases inside boxes. We can also manufacture other di...
MacGuard Japan LLC
290+ people viewing
Last viewed: 19 hours ago
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.
