What MacLean-Fogg Component Solutions makes

MacLean-Fogg Component Solutions (MFCS) is the components division of MacLean-Fogg Company, organized around four lines: fastener solutions, engineered solutions, plastic solutions, and additive solutions. On the fastener side, the company produces locking fasteners, bolts, studs, and specialty hardware, including its Lockthread and SALT locking systems designed to hold clamp load in high-heat exhaust and turbocharger applications. On the engineered side, it makes cold-formed and machined metal components such as piston pins, driveline hubs, and suspension bushing components for automotive and heavy-truck powertrains and chassis.

The plastic solutions line runs injection and insert molding of engineered functional plastics, often as a lighter, lower-cost replacement for rubber or metal parts. MacLean Additive, the additive solutions unit, applies metal 3D printing to tooling and production parts. Across all four lines the manufacturing toolkit is broad: hot forging on multi-station presses, warm and cold forming, CNC and screw machining, thread tapping, deep drawing, heat treatment, precision grinding, and automated assembly and inspection. MFCS supplies OEMs and tier suppliers across automotive, heavy-duty truck and trailer, agriculture, appliance, industrial motors and engines, hand tool, fire safety, and other industrial markets. The parent company describes the division as serving roughly 14 markets, a diversification away from its original automotive-only focus.

Financial performance

MacLean-Fogg Company is privately held and does not publish audited figures. On its own corporate materials the company reports group sales exceeding $1 billion annually and a workforce it states at more than 3,500 employees across North America, Europe, and Asia. The MFCS division itself is estimated at roughly 1,000 employees. These are group and division bands rather than divisional revenue; MFCS does not report standalone financials, so no division-level revenue figure is published here. Point revenue estimates for the group that circulate in commercial data brokers run well below the company's own $1 billion statement and reflect modeled guesses rather than reported numbers.

Ownership and history

MacLean-Fogg was founded in 1925 when John MacLean Sr. started a locking-fastener business built around the Number 1 Lock Nut and two railroad customers, the Santa Fe and the Milwaukee. The company sold its original railroad business in 1983 and grew through internal product development and acquisitions into a diversified manufacturer. The Metform hot-forming division was founded in 1976, and the automotive components business expanded through acquisitions including Royal Oak, Michigan in 1999 (later MFCS Farmington Hills) and the automotive division of Curtis Screw Company in 2014. The company remains family-owned and reached its 100th anniversary of continuous family ownership in 2026.

Leadership is fourth generation. Barry MacLean, who joined in 1961 and became president in 1972, serves as Chairman. Duncan MacLean, the great-grandson of the founder, is President and CEO; he joined in 1996 and has led the company as CEO since November 2017. Michael Isaacs is Executive Vice President and Chief Financial Officer. Beyond MFCS, the MacLean-Fogg portfolio includes Mallard Manufacturing in gravity-flow warehouse systems, OMCO in custom roll forming and solar racking (acquired in 2026), and the Threadstrong aftermarket fastener brand.

Certifications and quality

MFCS plants operate automotive quality systems. MacLean Curtis states that its operations are guided by IATF 16949 and ISO 14001 certified systems, and MFCS publishes per-location quality pages listing site certifications. IATF 16949 is the standard quality-management framework for automotive production and the sector norm for a components supplier of this profile; the company reports it as a claim at its component plants. In August 2026 the MacLean Master facility in Plymouth, Michigan earned and regained Ford Q1 certification, the point at which all 11 MacLean-Fogg facilities supplying Ford held Q1 status. The company describes standard automotive quality disciplines such as APQP and PPAP as part of how it launches parts, which matters to buyers weighing tooling and program-launch risk.

Known customers

Most of MFCS's customers are unnamed, as is normal for a components maker serving OEM and Tier-1 programs. One relationship is on the public record:

Beyond that documented program, MFCS serves automotive OEMs and tier suppliers, heavy-duty truck and trailer makers, and a broad set of industrial and agricultural customers, but specific names beyond Ford are not published.

Sourcing evidence

MacLean-Fogg is primarily a domestic manufacturer that forges and forms parts in the United States, and its US import footprint is correspondingly small and dated. Public bill-of-lading records for its component divisions show modest activity: on the order of 77 sea shipments associated with Metform (most recent 2020), 44 with MacLean Maynard (most recent 2022), and a handful with a MacLean-Fogg fastener entity (last seen 2016). That pattern fits a producer sourcing occasional overseas tooling or specialty inputs rather than importing finished goods, and it is not a meaningful indicator of current activity for a US forger of this size.

Coverage caveats: these are US ocean-freight records only. Air, truck, and rail movements do not appear, some records name freight intermediaries rather than manufacturers, and product categories come from declared manifest codes, which are noisy. For a domestically focused manufacturer, absence of a large import record is expected and is not evidence of reduced activity. Buyers evaluating nearshoring or domestic-content requirements can read MFCS's US and Germany plant base as the operative footprint.

Frequently asked questions

What does MacLean-Fogg Component Solutions make?

MacLean-Fogg Component Solutions makes fasteners, engineered metal components, engineered plastic components, and additive (3D-printed) solutions. Products include locking fasteners and bolts, cold-formed piston pins, driveline hubs, suspension bushing components, and injection-molded functional plastics, produced through hot forging, cold and warm forming, machining, molding, and heat treatment.

Who owns MacLean-Fogg Component Solutions?

MacLean-Fogg Component Solutions is the components division of MacLean-Fogg Company, a family-owned American manufacturer founded in 1925 and headquartered in Mundelein, Illinois. The company is in its fourth generation of family leadership and marked 100 years of continuous family ownership in 2026. Barry MacLean is Chairman and Duncan MacLean is President and CEO.

What is MacLean-Fogg's annual revenue?

MacLean-Fogg Company reports group sales exceeding $1 billion annually on its own corporate materials. The company is privately held and does not publish audited figures, and it does not report standalone revenue for the MFCS division. Point estimates circulating in commercial data brokers are modeled guesses rather than reported numbers.

Where is MacLean-Fogg Component Solutions located?

MacLean-Fogg's corporate headquarters is at 1000 Allanson Road, Mundelein, Illinois 60060, which is also the Mundelein fastener plant. MFCS operates plants across Illinois, Michigan, Pennsylvania, New York, North Carolina, and Wisconsin, plus a facility in Liederbach, Germany, with global support offices in Asia and Mexico.

Who are MacLean-Fogg's customers?

Ford is a documented customer: all 11 MacLean-Fogg facilities that supply Ford held Ford Q1 supplier certification as of August 2026. Most other customers are unnamed, which is typical for a components supplier serving OEM and Tier-1 automotive, heavy-truck, and industrial programs across roughly 14 markets.

What certifications does MacLean-Fogg Component Solutions hold?

MFCS reports IATF 16949 and ISO 14001 certified quality systems at its component plants, with per-location certification detail on its site. IATF 16949 is the automotive-sector quality-management standard. The company also holds Ford Q1 status across its facilities that supply Ford, and it runs APQP and PPAP as standard program-launch disciplines.

Last verified September 28, 2026. Is this your company? Request a correction.