In the evolving world of modern engineering, the demand for lightweight, durable, and cost-effective materials has never been higher. Among the most versatile solutions are plastic shims – non-metallic components that deliver the same precision and stability as traditional metal alternatives while offering a unique range of benefits.
At Stephens Gaskets, we’ve been manufacturing high-performance plastic shims for over 70 years. Our products are trusted across global industries for alignment, insulation, and spacing in environments where precision and material compatibility are critical.
From aerospace assemblies to high-voltage electrical systems, our shims are engineered to perform under pressure – literally.
What Are Plastic Shims?
Plastic shims are flat, precision-cut spacers made from polymers such as PTFE (Teflon), nylon, or acetal.
They’re used to align, level, or separate components within a mechanical system, ensuring accurate spacing without the drawbacks of metal – such as corrosion or galvanic reaction.
They can be produced as sheets, rings, washers, or custom profiles, depending on your application. Stephens Gaskets supplies plastic shims in thicknesses from 0.001mm to 1.5mm, or as cut sheets measuring up to 24½” x 48½”, with custom dimensions available on request.
The Advantages of Plastic Shims Over Metal Shims
Plastic shims are not just an alternative – they’re an upgrade for many applications.
1. Corrosion and Chemical Resistance
Unlike metallic shims, plastics are naturally resistant to moisture, oxidisation, and chemical attack, making them ideal for corrosive or high-humidity environments.
2. Electrical and Thermal Insulation
Plastic provides exceptional dielectric strength, protecting sensitive components in electrical and electronic assemblies.
3. Lightweight Yet Strong
Despite being up to 80% lighter than steel, engineered plastics such as PTFE and acetal offer excellent compressive strength and stability.
4. Low Friction and High Durability
With low water absorption and a naturally slick surface, plastic shims reduce wear between moving parts and maintain long service life.
5. Cost-Effective and Easily Fabricated
Plastic is easier to cut, shape, and install – reducing machining costs and production time.
These properties make plastic shims a preferred choice across industries that value efficiency, performance, and sustainability.
Applications Across Global Industries
Plastic shims are now a mainstay in nearly every precision engineering sector, replacing metal in applications where flexibility, insulation, and chemical resistance are key.
- Aerospace: Used in cabin assemblies, composite structures, and electrical systems where weight reduction is critical.
- Automotive: Prevent galvanic corrosion between dissimilar metals in engine assemblies and suspension systems.
- Construction & Civil Engineering: Provide non-corrosive leveling and spacing in structural and façade installations.
- Electronics & Telecommunications: Act as insulators and vibration dampeners for high-precision electronic assemblies.
- Marine & Offshore: Protect against saltwater corrosion and thermal expansion in coastal environments.
- Medical & Pharmaceutical: Used in cleanroom and sterilised equipment due to non-reactive, low-contaminant materials.
Plastic shims from Stephens Gaskets are designed for durability, consistency, and compliance – wherever engineering demands perfection.
Materials We Manufacture Plastic Shims From
Choosing the right polymer depends on your environment and performance requirements. Stephens Gaskets produces precision shims in:
1. PTFE (Teflon)
Exceptional chemical resistance, temperature stability up to 260°C, and ultra-low friction.
2. Nylon
Strong, wear-resistant, and electrically insulating – perfect for dynamic or load-bearing applications.
3. Acetal (Delrin)
High stiffness, dimensional stability, and excellent machinability.
4. Polypropylene
Cost-effective, moisture-resistant, and lightweight for general-purpose use.
5. Polycarbonate
High impact resistance for mechanical and optical components.
Each material is carefully sourced, cut, and finished in-house using laser and CNC technology to ensure flawless dimensional accuracy.
The Stephens Gaskets Difference
What sets Stephens Gaskets apart is precision backed by experience.
- Over 70 years of manufacturing heritage in shims, gaskets, and washers.
- Advanced production methods, including laser cutting and plastic injection moulding.
- Rapid turnaround on both prototypes and high-volume orders.
- Worldwide delivery and dedicated technical support from our in-house team.
- Full traceability and ISO 9001:2015 quality assurance on every component.
We don’t just supply shims – we supply engineering certainty.
Sustainability and Efficiency in Modern Manufacturing
Plastic shims aren’t just practical; they support a more sustainable approach to manufacturing.
Their lightweight design reduces transport emissions, while their durability extends product life cycles – lowering overall resource consumption.
Stephens Gaskets also works to minimise production waste through precision laser cutting and material optimisation, ensuring environmental responsibility across our manufacturing processes.
Why Engineers Are Switching to Plastic Shims
In 2025, engineers are prioritising efficiency, reliability, and safety. Plastic shims meet these modern needs by offering:
- Weight reduction for more efficient designs.
- Superior insulation for electrical systems.
- Non-conductive spacing in hybrid assemblies.
- Resistance to chemicals and fluids used in industrial processes.
- Lower lifecycle costs compared to metallic shims.
This combination of performance, adaptability, and value makes plastic shims the future of precision manufacturing.
FAQs
1. Where can I buy precision plastic shims in bulk or custom sizes?
You can order directly from Stephens Gaskets, the UK’s leading plastic shim manufacturer. We produce custom and bulk plastic shims in PTFE, nylon, and other polymers, tailored to your specifications.
2. Are plastic shims strong enough for load-bearing applications?
Yes. Our plastic shims are made from engineering-grade polymers such as acetal and nylon, offering excellent compressive and tensile strength for heavy-duty industrial use.
3. What makes plastic shims better than metal for corrosion prevention?
Plastic shims are non-reactive and resist oxidation, eliminating the risk of galvanic corrosion between dissimilar metals in assemblies.
4. Can Stephens Gaskets provide next-day delivery or rapid turnaround?
We offer fast UK and international delivery on standard and custom sizes. Our in-house tooling and material stock allow for rapid prototyping and production turnaround.
5. How can I get a quote for custom plastic shim production?
Simply contact our sales team at sales@stephensgaskets.co.uk or call 0121 544 5808. We’ll review your drawing or specification and provide an immediate, competitive quote.
Conclusion
Upgrade your engineering precision with Stephens Gaskets’ plastic shims – lightweight, corrosion-resistant, and built for performance.
Contact Stephens Gaskets
Phone: +44 (0)121 544 5808
Email: sales@stephensgaskets.co.uk
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