Injection Molding
Granite State Plastics
37 Executive Dr, Hudson, NH 03051, United States
- Contract manufacturer / job shop
- Founded 1969
- ISO 13485:2016, UL registered
About Granite State Plastics
Granite State Plastics operates from a 50,000-square-foot facility in Hudson, New Hampshire. The company has been dedicated to continuous improvement since 1969 and remains privately held, with a philosophy of reinvesting in its people and equipment. As a full-service injection molder, GSP provides molding and assembly, plastics engineering, tooling and automation, and quality assurance. Its Hudson plant houses 31 injection molding machines ranging from 40 to 450 tons, including Class 7 and 8 cleanroom capacity. The shop offers in-house metrology with CMMs, optical comparators, and custom fixtures, and supports APQP, FAI, IQ/OQ/PQ, and PPAP validation. The company serves automotive, medical, and military customers, delivering tight-tolerance components and managing tool transfers for onshoring or supply-chain localization. GSP emphasizes a technically capable team, a structured tool-transfer process, and a quality management system built on ISO 13485:2016 registration and cGMP practices, positioning itself as a responsive partner that manages project timelines and costs.
Manufacturing capabilities
Inspection & quality
Assembly & services
Industries served
- Automotive
- Medical
- Military
Equipment
- 31 injection molding machines (40–450 tons)
- CMM (visual and touch probe)
- Optical comparators
- Gages and fixtures
- Class 7 and 8 cleanrooms
Company details
- Location
- Hudson, New Hampshire
- Company type
- Contract manufacturer / job shop
- Founded
- 1969
- Certifications
- ISO 13485:2016, UL registered
Frequently asked questions
Where is Granite State Plastics located?
Granite State Plastics is located at 37 Executive Dr, Hudson, NH 03051, United States.
What does Granite State Plastics do?
Granite State Plastics is listed under Injection Molding, and its listed capabilities and products include Injection Molding, Molding & Assembly, Plastics Engineering, Tooling & Automation, Cleanroom Molding (Class 7/8) and Metrology (CMM, Optical Comparators).
What industries does Granite State Plastics serve?
Granite State Plastics lists Automotive, Medical and Military among the industries it serves.
What certifications does Granite State Plastics have?
Certifications on file for Granite State Plastics: ISO 13485:2016 and UL registered.
When was Granite State Plastics founded?
Granite State Plastics was founded in 1969.
How do I request a quote from Granite State Plastics?
Use the Request a quote button on this page to send Granite State Plastics your requirements through FirmsLedger, or call (603) 595-7790 and visit granitestateplastics.com.
What companies are similar to Granite State Plastics?
Other Injection Molding companies in New Hampshire listed on FirmsLedger include Plastech Machining & Fab Inc., Poly-Ject Inc and Ambix Manufacturing, Inc..