Verified Nov 2026
Metal Stamping
·
Mendon, Michigan
·
Since 1974
TH Plastics, Inc is a privately held manufacturer based in Mendon, Michigan, founded in 1974. It employs roughly 500 to 1,000 people and reports an estimated annual revenue band of $10 to 50 million. The company produces custom injection-molded and decorative thermoplastic parts, along with welding and assembly services, for the appliance, automotive, electric-vehicle, industrial-equipment, and consumer-goods industries. Its Mendon plant was toured in November 2025 by a regional development representative, and the company has been listed in recent job postings for engineering roles.
TH Plastics, Inc at a glance
Revenue
$10-50M
Est. band
Employees
500-1,000
Founded
1974
Headquarters
Mendon, Michigan
Certifications
IATF 16949 · ISO 9001 · ISO/TS 16949
Import activity
206
Industries
Automotive
Electric Vehicles
Appliance
Industrial Equipment
Consumer Goods
Sourcing and import activity
From US customs bill-of-lading records
US sea imports
206
Named foreign suppliers
22
Top origins
Hong Kong S.A.R. · China · India · Germany
Shared foreign counterparties do not establish that these companies buy from TH Plastics, Inc.
What this tells a buyer
The company's most recent public development is a set of 2026 job postings for engineering roles at its Mendon, Michigan location, reported by the job board Emploive.
The company holds IATF 16949, ISO 9001, and ISO/TS 16949 certifications and offers single-shot and 2-shot molding, in-mold labeling, and ultrasonic, vibration, and spin welding.
TH Plastics operates facilities in Mendon, Michigan and Bowling Green, Ohio, and serves the appliance, automotive, and RV sectors.
Source: US customs bill-of-lading records and public filings · Last verified Nov 05, 2026
STABILITY SIGNALS
Established & active
52 years in operation (founded 1974).
Holds IATF 16949, ISO 9001, ISO/TS 16949 certification(s) per public sources.
Overview
TH Plastics, Inc is a privately held manufacturer based in Mendon, Michigan, founded in 1974. It employs roughly 500 to 1,000 people and reports an estimated annual revenue band of $10 to 50 million. The company produces custom injection-molded and decorative thermoplastic parts, along with welding and assembly services, for the appliance, automotive, electric-vehicle, industrial-equipment, and consumer-goods industries. Its Mendon plant was toured in November 2025 by a regional development representative, and the company has been listed in recent job postings for engineering roles.
At a glance
Attribute | Detail |
|---|---|
Founded | 1974 |
Headquarters | Mendon, Michigan |
Employees | 500-1,000 |
Revenue | $10-50M (estimated) |
Primary capability | Metal Stamping |
Certifications | IATF 16949 · ISO 9001 · ISO/TS 16949 |
What TH Plastics, Inc makes
The company holds IATF 16949, ISO 9001, and ISO/TS 16949 certifications and offers single-shot and 2-shot molding, in-mold labeling, and ultrasonic, vibration, and spin welding.
Products and capabilities described on the company's own site include Stamping, Injection Molding, Welding, Assembly, Mold (source: thplastics.com).
Certifications
TH Plastics, Inc is associated with the following certifications in public sources. Confirm the certified scope for the specific plant producing your part:
IATF 16949 — thplastics.com
ISO 9001 — thplastics.com
ISO/TS 16949 — mfg.com
Trade and customs footprint
The company's most recent public development is a set of 2026 job postings for engineering roles at its Mendon, Michigan location, reported by the job board Emploive. US customs bill-of-lading records list 206 inbound shipments across 22 foreign suppliers, with top origins including Hong Kong S.A.R. · China · India · Germany.
Latest developments
2026-08-31 — Project Engineer (Mendon, MI) at TH Plastics | Emploive (emploive.com)
2026-08-13 — After years of hard work, dedication, challenges, growth, and countless memories, the time has finally come to turn the page and begin a new chapter. ❤️ | TH Plastics, Inc (linkedin.com)
2026-04-14 — Yesterday, our team had the opportunity to visit TH Plastics, Inc in Tiffin as part of our ongoing business retention and expansion efforts. | Seneca Regional Chamber & Development (linkedin.com)
2025-11-04 — Thank you, TH Plastics, for the tour of your Mendon plant today. A special shoutout to CEO Chris Haas and Brian Kowalski, VP of Manufacturing, for sharing valuable insights on your workforce … | Dr. Bryan Newton (linkedin.com)
2025-07-30 — We’re proud to have partnered with TH Plastics, Inc, a leading designer and manufacturer of custom auxiliary equipment systems for the industry to create this company commercial. From material handling and drying … | Innovative Media Group, LLC (linkedin.com)
2025-02-21 — TH Plastics, Inc (linkedin.com)
Facilities
TH Plastics, Inc is headquartered in Mendon, Michigan. Public sources also reference these locations:
Mendon, Michigan — linkedin.com
Bowling Green, Ohio — thplastics.com
Company details
TH Plastics operates facilities in Mendon, Michigan and Bowling Green, Ohio, and serves the appliance, automotive, and RV sectors. TH Plastics, Inc was founded in 1974, has an estimated 500-1,000 employees, and is headquartered in Mendon, Michigan. On the LightSource stability read it is rated "Established & active": 52 years in operation (founded 1974). Holds IATF 16949, ISO 9001, ISO/TS 16949 certification(s) per public sources.
Frequently asked questions
What does TH Plastics, Inc make?
TH Plastics, Inc is a privately held manufacturer based in Mendon, Michigan, founded in 1974. It employs roughly 500 to 1,000 people and reports an estimated annual revenue band of $10 to 50 million. The company produces custom injection-molded and decorative thermoplastic parts, along with welding and assembly services, for the appliance, automotive, electric-vehicle, industrial-equipment, and consumer-goods industries. Its Mendon plant was toured in November 2025 by a regional development representative, and the company has been listed in recent job postings for engineering roles.
Where is TH Plastics, Inc headquartered?
TH Plastics, Inc is headquartered in Mendon, Michigan (106 E Main St, Mendon, Michigan, 49072-9650).
When was TH Plastics, Inc founded?
TH Plastics, Inc was founded in 1974.
How big is TH Plastics, Inc?
TH Plastics, Inc has an estimated 500-1,000 employees, with revenue in the $10-50M range (estimated).
What certifications does TH Plastics, Inc hold?
TH Plastics, Inc lists IATF 16949 · ISO 9001 · ISO/TS 16949 on its website. Confirm the certified scope for the specific plant producing your part.
Does TH Plastics, Inc import from overseas suppliers?
US customs bill-of-lading records show 206 inbound shipments for TH Plastics, Inc, with top origins including Hong Kong S.A.R. · China · India · Germany.
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Last verified Nov 2026. Is this your company? Request a correction.
Location & contact
Phone
+1 269-496-8495
Certification
IATF 16949 · ISO 9001 · ISO/TS 16949
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