All Categories
History
This section provides an overview for pom washers as well as their applications and principles. Also, please take a look at the list of 11 pom washer manufacturers and their company rankings. Here are the top-ranked pom washer companies as of December, 2024: 1.NBK America LLC, 2.M Seals A/S, 3.Accu Limited.
Table of Contents
A POM washer is a (flat) washer molded from Duracon.
Duracon® is a registered trademark of Polyplastics Corporation and is one of engineering plastics called POM (polyacetal resin). It has high electrical insulation properties and excellent impact resistance, creep resistance, chemical resistance, and abrasion resistance.
Taking advantage of the above advantages of POM, the POM washer is used in bolted joints to protect mating materials and provide electrical insulation.
Washers are used when the fastening force is large in relation to the size of the bolt head. By sandwiching a washer with a larger area than the bolt head, the washer expands the area of the seating surface, preventing the seating surface of the fastening part from sinking and loosening due to vibration or external force.
POM washers and other resin washers are used for the purpose of protecting the mating material from deformation by the fastening force and insulating the bolt and other members from current-carrying parts by utilizing the deformation and insulating properties of resin.
Rubber washers are used to prevent loosening when vibration is applied to the fastening part or when airtightness of the fastening part is important.
Duracon® (POM) is classified as a general-purpose engineering plastic and has many advantages, such as moldability, mechanical strength, impact resistance, abrasion resistance, fatigue resistance, insulation properties, and chemical resistance. Among these, insulation, material strength, and fatigue resistance are important for plastic washers. The advantage over engineering plastics, such as PTFE (Teflon resin) and PC (polycarbonate resin), which have similar characteristics, is that they are available at a lower cost.
Disadvantages of POM washer include flammability due to the presence of oxygen in its molecular structure, low weather resistance, poor adhesive bonding (welding is possible), and resistance to strong acids. Therefore, washers made of different materials should be selected for use in areas where the use of explosion-proof equipment is designated, such as facilities where volatile organic solvents are used, for outdoor use, or in environments where strong solvents or cleaning agents are applied.
POM washers cannot be transparent due to the crystalline nature of the resin, although this is a limited application. Black and white products are available.
*Including some distributors, etc.
Sort by Features
Sort by Area
NBK America LLC, founded in 2015 and based in King of Prussia, Pennsylvania, is an American manufacturer and a subsidiary of Japan's Nabeya Bi-tech Kaisha, specializing in mechanical components. Their product range includes couplings, like miniature shaft couplings for precision machine tools and semiconductor manufacturing equipment, special screws, such as vacuum application screws and other machine components. NBK offers finite automaton (FA) solutions, including wireless positioning units for production lines and setup operations. NBK provides machine component servicing, such as vibration resistance treatment and laser engraving. Services for couplings and special screws include coupling stainless steel screw alteration and screw length adjustment.
Takai Seiki Co. Ltd., established in 1906 and headquartered in Fujisawa City, Japan, is a manufacturer of retainers for miniature to small-sized high-precision ball bearings. The company's offerings include bearing cages (retainers), plastic bearings designed for applications requiring low friction and weight reduction, as well as machining tools and precision metal molds for various manufacturing needs. Certified with ISO 14001 and ISO 9001, the company has received accolades, including the Minister of International Trade and Industry Award in 1984.
JIAXING TISEN SLIDING BEARING CO., LTD., located in Jiaxing, Zhejiang Province, China, is a manufacturer of plain bearings, sliding bearings, oilless bearings, self-lubricating bearings, and composite bearings. The company’s factory has advanced production technology and equipment, with outstanding enterprise management concept and technicians. Their products have the advantages of low noise, wear-resistant and long-lived, applying in the fields such as all kinds of machines, electric tools, instrument and apparatus, automobile, and motorcycles. They provide products to both domestic and overseas customers and mainly exports to Russia, Ukraine, Italy, South Korea, Canada, United States, United Kingdom.
Jiaxing Viiplus International Trading Co. Ltd., established in China in 2016, is a manufacturer of self-lubricating bearings. The company's range of products includes sleeve bearings, flanged bearings, thrust bearings, and custom bearing solutions in various sizes and textures. Its products are used in industries such as automotive and transportation, industrial manufacturing, aerospace and defense, marine and renewable energy. The company exports its products to North America, South America, Europe, and, the Middle East.
VIIPLUS Bearing Company, established in 2016 and headquartered in Zhejiang, China, is a manufacturer that specializes in providing self-lubricating bushings and oilless bearing materials. The company offers a wide range of products, including plain bearings, wrapped bronze bearings, bronze bushings, and bimetal bearings. It also offers thrust washer pom self-lubricating holes, self-lubricating bronze bushing, solid bronze bearings, and plugged graphite bronze parts couplings. Its products are dirt-resistant, insertable at high temperatures, and made with solid lubricant bronze material. The company has achieved ISO 9001:2015 and RoHS Certification. It serves industries such as automotive, machinery and equipment, electronics, construction, and more.
Nippon Chemical Screw & Co. Ltd., established in 1965 and based in Tokyo, Japan, is a manufacturer and supplier of plastic fasteners. The company specializes in diverse range of plastic screws and components, including micro screws, bolts, spacers, and various molds, like injection and press molds. It serves diverse industries such as semiconductors, marine, and electronics, handling an array of materials ranging from engineering plastics to advanced PPS and PEEK for diverse applications. The company also offers custom parts development, from initial design to mold creation and final injection molding.
Accu Limited, founded in the UK in 2012, is a supplier of engineering components. The company offers a wide selection of bearings and bushings, including plain bearings, roller bearings, ball bearings, a comprehensive range of fasteners, such as screws, bolts, nuts, and washers, available in various materials and sizes and high-quality seals and gaskets for sealing applications in industries like automotive, manufacturing, and more. It serves industries such as automotive, aerospace, manufacturing, and construction.
Jiashan Jingye Import & Export Co.,Ltd, founded in China, is a supplier of oil less bearings and related products. The company specializes in oil-less bearings designed to operate without the need for external lubrication. These self-lubricating bearings are ideal for applications where traditional lubrication may not be practical or cost-effective. It serves a wide range of industries, including manufacturing, automotive, aerospace, medical devices, and more. It exports to over 20 countries and regions such as Germany, Italy, Spain, and Turkey.
Ranking as of December 2024
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | NBK America LLC |
28.6%
|
| 2 | M Seals A/S |
14.3%
|
| 3 | Accu Limited |
14.3%
|
| 4 | JIAXING VIIPLUS INTERNATIONAL TRADING CO.,LTD |
14.3%
|
| 5 | JIAXING TISEN SLIDING BEARING CO.,LTD |
14.3%
|
| 6 | TAKAI SEIKI CO., LTD |
14.3%
|
Derivation Method
The ranking is calculated based on the click share within the pom 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 (%) |
|---|---|---|
|
China
|
4 | 50.0% |
|
United States of America
|
1 | 12.5% |
|
Japan
|
1 | 12.5% |
Denmark
|
1 | 12.5% |
|
United Kingdom
|
1 | 12.5% |
