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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 March, 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 March 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 March 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
207 products
Shinken Precision Co., Ltd.
490+ people viewing
Last viewed: 7 minutes ago
This is a series with a thin nut width. This is convenient when you want to make the installation width compact, but since the number of screw groo...
Takeda Shoji Co., Ltd.
510+ people viewing
Last viewed: 20 hours ago
■World's thinnest lock nut Adopts a unique locking mechanism to achieve highest class locking force with a single nut. ■ Uniform locking from all ...
Hard Rock Industries Co., Ltd.
500+ people viewing
Last viewed: 2 hours ago
HLB-R is an improved type of HLB and uses the same wedge-based integrated structure technology. Even if high loads are applied repeatedly, the init...
Fuji Precision Co., Ltd.
500+ people viewing
Last viewed: 1 hour ago
■Features ・Reusable ・Fine adjustment is possible at any position, and torque management is also easy. ・No need for toothed washer or shaft keywa...
10 models listed
Hard Rock Industries Co., Ltd.
520+ people viewing
There is no need to bend the troublesome tongued washer into a lock nut. A hexagonal single type that can maintain the bearing's initial rigidity a...
Global Parts Co., Ltd.
280+ people viewing
Last viewed: 35 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...
10 models listed
MacGuard Japan LLC
340+ people viewing
Last viewed: 22 hours 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...
TOCHIGIYA CO.,LTD.
440+ people viewing
■Summary EMKA's quarter turns allow you to select the most suitable quarter turn from a wide variety of products by freely combining the basic part...
Shinken Precision Co., Ltd.
410+ people viewing
Last viewed: 21 hours ago
It has a split nut structure with 6 set screws placed on the end face. The set screw elastically deforms the split nut and strongly prevents it fro...
Hard Rock Industries Co., Ltd.
510+ people viewing
Last viewed: 7 hours ago
The HLB uses the same wedge-integrated structure technology as the Hardlock Nut, so it can maintain the initial preload for a long period of time n...
Shinken Precision Co., Ltd.
420+ people viewing
Last viewed: 9 hours ago
This type has a nut width thicker than SWT/R, ensuring a sufficient number of thread grooves. The set piece is tilted 30 degrees to the radial dire...
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...
MacGuard Japan LLC
310+ people viewing
A propeller lock is a lock nut that can be attached to a propeller to prevent theft of the propeller, whether on land or in the water. Easy to inst...
Nikki Co., Ltd.
510+ people viewing
Last viewed: 17 hours ago
■What is AN nut (bearing nut)? A nut is one of the fastening parts used for assembling machines. It has an opening called a female thread (female t...
Shinken Precision Co., Ltd.
400+ people viewing
Last viewed: 22 hours ago
This type has a split nut structure with 4 to 6 set screws on the end face of the nut. Suitable for severe applications such as high rotational acc...
Global Parts Co., Ltd.
250+ people viewing
Last viewed: 35 minutes 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...
10 models listed
Shinken Precision Co., Ltd.
440+ people viewing
Last viewed: 10 hours ago
Both a wrench and a spanner can be used for tightening. It comes with 3 set pieces and is easy to use. The threaded part of the nut and the tighte...
MacGuard Japan LLC
340+ people viewing
Last viewed: 9 hours ago
The outboard motor lock is an anti-theft lock nut for outboard motors installed on the stern transom. Easy installation by simply replacing the nut...
MacGuard Japan LLC
320+ people viewing
Last viewed: 22 hours 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...
Global Parts Co., Ltd.
210+ people viewing
Last viewed: 34 minutes 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...
10 models listed
Shinken Precision Co., Ltd.
540+ people viewing
Last viewed: 1 minute ago
This is a type where the 3 set pieces are tightened from the end side of the nut instead of from the outer periphery. The adhesion of the set piece...
Shinken Precision Co., Ltd.
450+ people viewing
Last viewed: 22 hours ago
A lock nut with a simple structure. Set piece construction not included. The threaded part of the nut and the tightening end face are simultaneous...
Global Parts Co., Ltd.
240+ people viewing
Last viewed: 12 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...
10 models listed
Global Parts Co., Ltd.
340+ people viewing
Last viewed: 18 hours ago
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 ...
10 models listed
Nikki Co., Ltd.
240+ people viewing
Last viewed: 1 day ago
■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
Nikki Co., Ltd.
290+ people viewing
Last viewed: 9 hours ago
■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
110+ people viewing
A one-car kit that includes lightweight spline drive lug nuts that are easy to install on tuner wheels. There are many color variations in the all-...
12 models listed
Global Parts Co., Ltd.
250+ people viewing
Last viewed: 1 day ago
YSA lock nuts are designed to tighten the shaft from three points in the axial direction, making them suitable for environments that require specia...
10 models listed
Nikki Co., Ltd.
170+ people viewing
■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 ...
10 models listed
MacGuard Japan LLC
380+ people viewing
Last viewed: 1 day ago
A one-car kit that includes lightweight spline drive lug nuts that are easy to install on tuner wheels. There are many color variations in the all-...
