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NOK Corporation, commonly referred to as NOK, is a prominent Japanese manufacturing company specializing in the production of sealing products, functional parts, and electronic components. Founded in 1939 and headquartered in Minato, Tokyo, Japan.

NOK is one of the largest independent automotive parts manufacturers, and has business relationships with all 12 of Japan's complete vehicle manufacturers. NOK boasts a 70% share of the domestic market for oil seals, its mainstay product, and a 50% share including overseas markets. NOK also has an 80% share of the domestic O-ring market and 40% share of the domestic market for flexible printed circuit boards (FPCs) for cell phones and HDDs, which are manufactured and sold by subsidiary Nippon Mektron.

Overseas sales account for about 40% of the company's total sales, with seal production bases in Vietnam and Thailand, and FPC production bases in China. In 2007, the company launched a new subsidiary, Shinji Tech, to strengthen the production of rolls used in printers and other office equipment.

History
NOK was initially founded as Nippon Oil Seal Industry Co., Ltd. in 1939. The company began by manufacturing oil seals and various rubber products, gradually expanding its product range and technological capabilities.

In March 1960, a captical participation agreement is concluded with Freudenberg Group in Germany.

In January 1966, the head office was moved to Minato-ku, Tokyo.

In March, 1968, NOK-USA Inc., was founded in the USA.

Over the years, NOK has played a crucial role in the development of high-performance sealing solutions, contributing significantly to advancements in automotive engineering and industrial machinery.

Products and Services
NOK's product portfolio is diverse, encompassing a wide range of sealing products, including:


 * Oil Seals: Essential for preventing fluid leakage in engines, transmissions, and other machinery.


 * O-rings: Versatile sealing components used in various applications.


 * Mechanical Seals: Used in pumps, compressors, and other rotating equipment to prevent leakage.


 * Electronic Components: Including flexible printed circuits and touch panels.

NOK is also known for producing functional parts such as anti-vibration components, which enhance the performance and durability of vehicles and industrial machines.

Related companies

 * Freudenberg Group : strategic partnership
 * Eagle Industries: wholly-owned sucsidiary of machanical seal manufacturing
 * Nippon Mektron: wholly-owned sucsidiary of Electronic Component manufacturing