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.
1988
OEM Manufacturing & Sales was founded in Los Angeles, California. The company began serving the maquiladora industry.
1991
Headquarters were relocated to San Diego, California.
1994
OEM moved into its current facility, featuring office space and a 20,000+ square foot warehouse.
1998
Inserts International was established, specializing in standard and custom inserts for contract molders.
2000s
The company expanded its global supply base in Asia and broadened its manufacturing capabilities.
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.
2012
Hip Hing achieved TS 16949 certification.
2015
OEM and Inserts International became ISO 9001:2008 certified.
2016
Rubber Products Solutions (RPS) was founded.
2018
The company became a certified Foreign Trade Zone (FTZ). OEM also successfully transitioned to the ISO 9001:2015 standard following its audit.
2019
OEM’s owner acquired a machining facility in China, which was integrated into the Hip Hing operations in Dongguan.
2020
Hip Hing renewed its automotive certification under the updated IATF 16949 standard.
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.
2025
Hip Hing expanded operations with a new production facility in Hanoi, Vietnam. They also purchased a rivet factory in Dongguan.
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