Fin-Con Assembly Group

Fin-Con Assembly Group

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We are a contract manufacturer of custom wire harnesses and cable assemblies.

Fin-Con began in 1991; we have grown and continue to mature as a supplier known for our open and honest approach to doing business. Beginning in 1990 with a group of experienced personnel from the wire harness and cable assembly industry, Fin-Con has grown and continued to mature as a supplier known for our caring and honest approach to doing business. Part of the Fin-Con strategy is to build a pa

07/04/2026

This 4th of July we celebrate 250 years of America. A nation built upon the ideals of freedom, liberty, and justice for all, including a history of perseverance and innovation.

At Fin-Con, we are proud to say our products are made right here in the United States of America. Our team reflects the same hardworking values that have helped shape our nation for generations.

Today, we honor those who fought for our freedoms, those who continue to protect them, and the communities that make America strong.

We wish everyone a safe and enjoyable Independence Day filled with family and friends.

Happy 4th of July from all of us at Fin-Con!

Our Production Process 06/29/2026

Ever wonder what goes into building a wire harness?

Our production process begins with one goal: delivering a quality product from the very first build.

We start by reviewing drawings, confirming tooling, creating work instructions, and building a first article. Once we receive customer approval on the first article, we then release the balance to our production team. This process helps keep every harness consistent.

Efficient. Repeatable. Customer‑focused.

Our Production Process Quick overview of our production process:We review a drawing or s...

OFI's: Every "Mistake" is an Opportunity for Improvement 06/11/2026

At Fin-Con, we understand mistakes can happen. After all, that's part of being human.

What sets us apart is how we learn from our mistakes and make adjustments moving forward.

Each "mistake" is just an opportunity for improvement.

OFI's: Every "Mistake" is an Opportunity for Improvement At Fin-Con we understand mistakes can happen. After all, we are all...

Welcome to MAM, Fin-Con Assembly Group, Inc.! Located just outside St. Louis, Fin-Con has steadily grown into a trusted supplier of wire harnesses and cable assembly since their beginning in… | Missouri Association of Manufacturers 05/27/2026

A big thank you to Missouri Association of Manufacturers for the warm welcome!

At Fin‑Con Assembly Group, we’re proud to be part of such a strong manufacturing community and truly appreciate all MAM does to support manufacturers across the state of Missouri.

We’re excited to connect, collaborate, and grow together as this partnership gets underway.

Looking forward to what’s ahead! 🤩

Welcome to MAM, Fin-Con Assembly Group, Inc.! Located just outside St. Louis, Fin-Con has steadily grown into a trusted supplier of wire harnesses and cable assembly since their beginning in… | Missouri Association of Manufacturers Welcome to MAM, Fin-Con Assembly Group, Inc.! Located just outside St. Louis, Fin-Con has steadily grown into a trusted supplier of wire harnesses and cable assembly since their beginning in 1991. Their team's capabilities allow them to serve a broad industry base, including Communication, Electroni...

05/26/2026

I hope everyone had a fun and safe Memorial Day weekend.

Memorial Day is a time to remember and honor those who gave their lives for our freedom. Their sacrifice will never be forgotten.

Thank you to the ones that serve our country🇺🇸
Land Of The Free Because Of The Brave

05/19/2026

What is one thing we never take for granted at Fin-Con?

Our people.

Every day, we are thankful for our team, our customers, and each new person we connect with.

Whether we first connected years ago or just met for the first time today, we hope YOU know we appreciate you! 😊

05/18/2026

Thank you to everyone who stopped by our booth at the D2P Schaumburg show and entered our drawing for a chance to win a $50 eGift Card!

Congratulations to the winner, Dan Kruse!!

05/14/2026

Have you ever wondered what it’s like to work at Fin-Con?
There’s a reason our team loves it here!

At Fin-Con, you’ll find a collaborative culture, passionate people, and work that truly makes an impact.

Watch our video to see what current employees love most about working at Fin-Con, from the supportive team environment to the opportunities for growth.

Photos from Fin-Con Assembly Group's post 05/06/2026

Come see us at booth #212!

Photos from Fin-Con Assembly Group's post 05/04/2026

Built right, from the beginning.

Our Prototype & First Article process validates quality, performance, and precision—so production starts with confidence.

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Telephone

Address


76 N Central Drive
O'Fallon, MO
63366

Opening Hours

Monday 7am - 4:30pm
Tuesday 7am - 4:30pm
Wednesday 7am - 4:30pm
Thursday 7am - 4:30pm
Friday 7am - 4:30pm