About Us

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About Monroe OEM

Monroe OEM, LLC is a trusted manufacturing partner for companies looking to lower costs, improve efficiency, and reduce the complexity of managing multiple vendors. Since 1988, we have helped manufacturers strengthen their supply chains by delivering quality components, engineering support, and customized inventory solutions.

Over the years, our capabilities have expanded far beyond fasteners to include inserts, springs, stampings, shafts, screw machine parts, wire forms, extrusions, die casts, cold-headed specials, sub-assemblies, bag kitting, and a wide range of custom metal, plastic, and rubber components. By working with leading manufacturers and injection molders worldwide, we are able to provide dependable production support backed by global reach and hands-on oversight.

With headquarters and warehousing in San Diego, California, and a full-time office in China, we maintain close visibility into production and quality control processes to help ensure reliable results. Our goal is not just to supply parts, but to create value through responsive service, technical guidance, and an integrated approach to supply chain management.

From cost-reduction initiatives to customized stocking programs, Monroe OEM is committed to helping customers operate more efficiently and competitively. Our reputation for performance, pricing, and service has made us a valued partner to companies seeking the benefits of offshore manufacturing without unnecessary complications.

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History of Monroe OEM

1988

OEM Manufacturing & Sales was founded in Los Angeles, California. The company began serving the maquiladora industry.

1988

1991

Headquarters were relocated to San Diego, California.

1991

1994

OEM moved into its current facility, featuring office space and a 20,000+ square foot warehouse.

1994

1998

Inserts International was established, specializing in standard and custom inserts for contract molders.

1998

2000s

The company expanded its global supply base in Asia and broadened its manufacturing capabilities.

2000s

2010

OEM’s owner acquired Hip Hing, the company’s largest fastener supplier in China. This strategic acquisition improved supply chain control and enabled consolidated full-container shipments.

2010

2012

Hip Hing achieved TS 16949 certification.

2012

2015

OEM and Inserts International became ISO 9001:2008 certified.

2015

2016

Rubber Products Solutions (RPS) was founded.

2016

2018

The company became a certified Foreign Trade Zone (FTZ). OEM also successfully transitioned to the ISO 9001:2015 standard following its audit.

2018

2019

OEM’s owner acquired a machining facility in China, which was integrated into the Hip Hing operations in Dongguan.

2019

2020

Hip Hing renewed its automotive certification under the updated IATF 16949 standard.

2020

2024

OEM, Inserts International, and RPS were acquired by OneMonroe, forming Monroe OEM, LLC. This transition strengthened capabilities and expanded customer value. Additionally, Hip Hing relocated to a new, modern facility in Shaoguan equipped with advanced technology, significantly increasing production capacity.

2024

2025

Hip Hing expanded operations with a new production facility in Hanoi, Vietnam. They also purchased a rivet factory in Dongguan.

2025

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