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This section provides an overview for lock washers as well as their applications and principles. Also, please take a look at the list of 6 lock washer manufacturers and their company rankings. Here are the top-ranked lock washer companies as of December, 2024: 1.L.H. Dottie., 2.ITW Shakeproof Industrial, 3.Seastrom Manufacturing Co., Inc..
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Categories Related to Lock Washers
Lock washers, designed to prevent loosening of bolts, screws, and nuts, play a vital role in securely fastening components together.
A washer is a thin metal ring placed between the head of a bolt (or screw) and the nut. Its primary functions are to prevent loosening and to protect the surface of components from damage during tightening.
Various types of lock washers exist, including nord-lock washers, ribbed-lock washers, spring washers, belleville washers, conical spring washers, and serrated conical spring washers.
Lock washers are essential in machinery and vehicles subject to intense vibrations, preventing loosening that could lead to malfunctions or accidents. High-performance lock washers like nord-lock and ribbed lock washers are particularly effective in preventing both rotational and non-rotational loosening.
They are also crucial in electrical and precision machinery, where contact resistance is key. Lock washers increase the contact area, enhancing electrical signal transmission and reducing resistance.
In outdoor or humid environments, corrosion-resistant lock washers made of stainless steel or titanium are used to prevent rust and corrosion by creating a gap between the bolt or nut and the joined material.
Lock washers address two main causes of loosening:
Rotational loosening: Caused by vibrations leading to reverse rotation of the bolt or nut.
Non-rotational loosening: Due to material contraction, such as in wood.
Types and principles:
Nord-lock washers, with their unique two-piece serrated design, prevent rotational loosening by increasing tightening force when a bolt attempts to rotate in the opposite direction.
Ribbed lock washers, with tapered ribs, embed into bolt seats and materials, maintaining tightening force over time to prevent rotational loosening.
Spring washers, with their simple spring-like design, offer cost-effective protection against both rotational and non-rotational loosening. Serrated conical spring washers provide enhanced resistance against loosening due to their serrated surface.
Selection of lock washers should be based on the specific causes of potential loosening, such as vibration, corrosion, or material contraction. Factors like size, type of screws, operating environment, and required resistance properties should guide the choice of washer.
The magic ring on titanox washers is a wedge-shaped mechanism that converts vibrations into increased tightening effects. This feature is particularly effective against vibrations from natural events or machinery, ensuring long-term strength and reliability in wooden structures.
*Including some distributors, etc.
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ITW Shakeproof Industrial is a manufacturer of fastening equipment originally founded in 1923 as the Illinois Lock Washer Company before its acquisition by Illinois Tool Works (ITW) in 2010. Based in Watertown, Wisconsin, the company offers various fastening solutions including threaded screws, machine screws, pins, and lock washers. These are primarily used by client manufacturers of consumer appliances, trailers, heavy trucks, and rail equipment. ITW Shakeproof also provides design assistance, testing, and in-house prototyping customers with unique stability concerns services for customer projects.
L.H. Dottie, established in 1965 with headquarters in Commerce, California, is a manufacturer, distributor, and supplier of industrial fasteners and hardware. Their extensive product range includes screws, anchors, fastener kits, hangers, electrical fittings, pipe supports, staples, adhesives, and tools. Holding an ISO 9001:2015 certification, and is UL listed, the company caters to diverse industries such as electrical, security, energy sector, and plumbing/HVAC industries, providing products that play a crucial role in securing and fastening various materials like wood, metal, and concrete.
Wrought Washer, established in 1905 and headquartered in Milwaukee, Wisconsin, USA, is a manufacturer and supplier of standard and special washers. The company’s product range includes standard washers such as flat washers, spring washers, lock washers, and split washers, as well as special washers tailored to meet unique customer specifications. These products cater to diverse industries, including automotive, construction, electrical, agriculture, and material handling. Its services include manufacturing, testing and certification, supply chain management, and technical support. Devoted to delivering quality washers and services, the company holds ISO 9001:2015 certification.
KD Fasteners, Inc. was founded in 1987 and headquartered in Addison, Illinois. The company is a fastener manufacturer and distributor, specializing in custom fasteners from such materials as steel, brass, silicon bronze, and other non-ferrous metals, supplying over 100,000 different fastener components. The company has 3 product segments: standard fasteners, standard metric fasteners, and custom fasteners. Custom fastener varieties include studs, washers, machine screws, flange bolts, and many other varieties. The company also offers many plating varieties including zinc, black oxide, waxing, and Magni 565 and 560.
Ti Kato is based in Chiyoda-ku, Tokyo, Japan, and is a manufacturer and distributor of construction parts and components that was originally established as Kato Hardware Store in 1950. The company’s product lineup includes its Tightnik-branded specialized washers designed to resist degradation or loosening from earthquakes, its Relevel-branded custom adjustment plate designed for ventilation and ease-of-use, and its Gripper-branded secured fixture for anchor bolts designed for one-touch installation. The company’s products are commonly used in the construction, home maintenance, and DIY markets.
Seastrom Manufacturing Co., Inc. is an ISO 9001-certified manufacturer of precision washers and related hardware that was established in 1928 in Glendale, California, USA. The company offers standard washer models such as lock and flat round washers, military spec washers such as AN and MS series washers, and specialty assembly hardware products such as Hiram Jones pins and expansion plugs. It also offers custom engineering and laser part marking services for unique projects. The company’s products and services are commonly used in the aerospace, defense, and heavy machinery industries.
Ranking as of December 2024
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | L.H. Dottie. |
42.9%
|
| 2 | ITW Shakeproof Industrial |
14.3%
|
| 3 | Seastrom Manufacturing Co., Inc. |
14.3%
|
| 4 | Wrought Washer Manufacturing, Inc. |
14.3%
|
| 5 | KD Fasteners, Inc. |
14.3%
|
Derivation Method
The ranking is calculated based on the click share within the lock washer page as of December 2024. 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
|
4 | 100.0% |
135 products found
135 products
Otsuki Shoten Co., Ltd.
520+ people viewing
Last viewed: 4 hours ago
Standard Response
■Earthquake-proof and anti-loosening washers that are effective in areas with strong vibrations. This is a vibration-resistant and shock-resistant ...
10 models listed
Yamamoto Neji Kohan Co., Ltd.
30+ people viewing
Last viewed: 8 hours ago
The Wedge Lock Washer is a locking product that uses axial force to tighten bolts and nuts in important locations safely, easily, and reliably. ■F...
Japan Pralad Co., Ltd.
2530+ people viewing
Last viewed: 1 hour ago
Standard Response
5.0 Company Review
"Sound Zero washer" that completely prevents bolts around (patented). Bolt size: Compatible with M14 to M72. ■ It is not a washer that uses the fr...
18 models listed
Musashi Oil Seal Industry Co., Ltd.
60+ people viewing
Last viewed: 1 day ago
Fast Response
■Summary A metal washer with baked rubber that prevents leakage from the bolt. A seal washer is a washer that prevents leakage from the bolt part. ...
Yunex joint company
340+ people viewing
Last viewed: 23 hours ago
Very Fast Response
The new high -talk J washer has added a locking function that minimizes the loosening of bolts caused by vibration. As a result, we raised the spec...
11 models listed
Yunex joint company
220+ people viewing
Last viewed: 4 hours ago
Very Fast Response
High talk washer is the easiest tool for improving safety, speed and accuracy. A system that does not see this kind of patent has eliminated the ne...
Wilco Co., Ltd.
510+ people viewing
Last viewed: 1 hour ago
Very Fast Response
■Features ・Generally speaking, "washer" refers to this flat washer. - When the hole diameter of the material to be tightened is larger than the sc...
20 models listed
Wilco Co., Ltd.
600+ people viewing
Last viewed: 6 hours ago
Very Fast Response
■Features ・Generally speaking, "washer" refers to this flat washer. - When the hole diameter of the material to be tightened is larger than the sc...
10 models listed
Wilco Co., Ltd.
820+ people viewing
Last viewed: 6 hours ago
Very Fast Response
■Features ・Generally speaking, "washer" refers to this flat washer. - When the hole diameter of the material to be tightened is larger than the sc...
10 models listed
Essentra Components Japan Inc.
30+ people viewing
Last viewed: 8 hours ago
Please contact us for details Contact information: TEL 045-321-2752 FAX 045-410-0383 mail: sales@essentracomponents.jp
Essentra Components Japan Inc.
40+ people viewing
Last viewed: 8 hours ago
Please contact us for details Contact information: TEL 045-321-2752 FAX 045-410-0383 mail: sales@essentracomponents.jp
Essentra Components Japan Inc.
30+ people viewing
Last viewed: 1 day ago
Please contact us for details Contact information: TEL 045-321-2752 FAX 045-410-0383 mail: sales@essentracomponents.jp
Essentra Components Japan Inc.
40+ people viewing
Last viewed: 5 hours ago
Please contact us for details Contact information: TEL 045-321-2752 FAX 045-410-0383 mail: sales@essentracomponents.jp
Essentra Components Japan Inc.
30+ people viewing
Last viewed: 5 hours ago
Please contact us for details Contact information: TEL 045-321-2752 FAX 045-410-0383 mail: sales@essentracomponents.jp
Essentra Components Japan Inc.
40+ people viewing
Last viewed: 50 minutes ago
Please contact us for details Contact information: TEL 045-321-2752 FAX 045-410-0383 mail: sales@essentracomponents.jp
Hoshimoto
50+ people viewing
Standard Response
■Features Please use when the screw or bolt diameter is smaller than the hole diameter of multi-angle or HU type channel. It has a larger outer dia...
Maru Emmako Co., Ltd.
560+ people viewing
Last viewed: 16 hours ago
■ Features ・ Compared to the conventional spring washer, a wavy and special shape, about 5 times larger sprane reaction force ・ Strong resistance...
10 models listed
Nano Precision Co., Ltd.
220+ people viewing
Last viewed: 1 day ago
Nano Precision, Taiwan (partner AGS) is in charge of all export operations from purchasing, quality control, packing, and shipment, including commu...
TOCHIGIYA CO.,LTD.
30+ people viewing
Last viewed: 12 hours ago
■Features Shield ring prevents water leakage. ■Applications Measuring instruments, medical equipment, food machinery, etc. ■Notes The shield ring...
Three Nine Shimano Co., Ltd.
20+ people viewing
Last viewed: 18 hours ago
■Product details ・Washers for wooden screws used when connecting furniture. ・Minimum sales unit 1A or 1 box or 1 bag ・No twist
Three Nine Shimano Co., Ltd.
20+ people viewing
Last viewed: 20 hours ago
■Product details ・Sold as a set of 10 each of set cap + set cap washer + screw (3.8 x 38). ・Minimum sales unit: 1 bag
Intaniya Co., Ltd.
20+ people viewing
Last viewed: 1 day ago
By using this washer in conjunction with camera screws, etc., you can obtain the effect of preventing loosening. Washer 6.5 is suitable for M6 or s...
Hirosugi Inc. Co., Ltd.
30+ people viewing
Last viewed: 13 hours ago
Very Fast Response
Hirosugi Inc. Co., Ltd.
850+ people viewing
Last viewed: 1 day ago
Very Fast Response
- Washers are generally placed between the screw and the object to be fastened when tightening a screw, and are used to prevent the screw from loos...
28 models listed
Azumaneji Co., Ltd.
40+ people viewing
Last viewed: 12 hours ago
■Loosening prevention washer (NORD-LOCK®) NORD-LOCK® washers use tension rather than friction to secure bolts. The system consists of a two-piece w...
