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This section provides an overview for expansion plugs as well as their applications and principles. Also, please take a look at the list of 5 expansion plug manufacturers and their company rankings. Here are the top-ranked expansion plug companies as of December, 2024: 1.US Tool and Manufacturing Company, 2.Pioneer Automotive Industries, 3.M.D. Hubbard Spring Co., Inc..
Table of Contents
An expansion plug is a component primarily used in engines and automotive cylinder blocks.
Designed to accommodate the expansion and contraction of mechanical components and systems under different temperature and pressure conditions, it is utilized in various applications. When an engine operates, the heat generated internally causes expansion of the engine block and coolant within the cooling system. Expansion plugs absorb this expansion, allowing the coolant to expand appropriately within the system without exerting excessive pressure. Conversely, when the engine cools down, the expansion plug contracts to maintain proper pressure within the cooling system.
Expansion plugs are typically made of rubber or metal and are resistant to thermal expansion and contraction.
*Including some distributors, etc.
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Pioneer Automotive Industries is based in Meridian, Mississippi, USA, and is a supplier in engine, powertrain, and transmission products established in 1946 before becoming part of the Lodi Group in 2010. The company offers a range of engine parts, including retainers, rocker arms, and valve springs. It also offers transmission mounts for manual as well as automatic transmissions, and powertrain components such as torque struts and driveshaft center supports. The company chiefly serves client OEMs and custom manufacturers in the automotive industry.
The Lee Company was founded in 1948 and is headquartered in Westbrook Connecticut. The company manufactures flow metering, fluid pumping, and related products for industries such as aerospace, automotive, power generation, and medical equipment to customers around the world through its global distribution network. The company’s primary product lines include valves, flow restrictors, pumps, and plugs. The company also offers customized products for individual markets to meet specific standards for each industry according to individual customer needs.
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 | US Tool and Manufacturing Company |
22.2%
|
| 2 | Pioneer Automotive Industries |
22.2%
|
| 3 | M.D. Hubbard Spring Co., Inc. |
22.2%
|
| 4 | Seastrom Manufacturing Co., Inc. |
22.2%
|
| 5 | Lee Company |
11.1%
|
Derivation Method
The ranking is calculated based on the click share within the expansion plug 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
|
1 | 100.0% |
