Precision Machined Washers Manufactured to Your Specification

Our Machined Washer Offering

At Pattern Fasteners we bring decades of manufacturing expertise to our machined washer production:

• Complete in-house machiningFrom bar feed to lathe turn, bore, chamfer, face and finish, we handle all processes.
• Full traceability & quality controlMaterial certificates, process logs and inspection reporting ensure consistency and reliability.
• Wide size rangeFrom very small diameters to larger machined washers for industrial-scale assemblies.
• Fast turnaround & volume capabilityWhether prototype runs or thousands of pieces, our flexible setup manages it.
• Finishing and coating optionsStandard finishes include machined turned finish, phosphate, passivate, plating (e.g., zinc, nickel) and more — tailored to your application needs.
• Technical support & custom specificationOur team can assist with washer design, specification, material choice and finish to optimise performance.

Typical Applications for Machined Washers

Machined washers are used across sectors where performance and precision matter. Typical uses include:

• Aerospace fasteners and structural assemblies
• Hydraulic and pneumatic systems
• High-precision automotive and motorsport components
• Marine and offshore equipment requiring corrosion resistance
• Machinery subject to vibration, cyclic loading or high stress

Choosing the Right Machined Washer

To select the appropriate machined washer for your application, consider:

• MaterialDepending on load, corrosive environment, temperature and fatigue life.
• Dimensions & tolerancesOD, ID, thickness, flatness – tighter tolerances improve load spread and reduce stress concentration.
• Finish/coatingFor corrosion resistance, appearance, or secondary plating compatibility.
• Batch size & costMachined washers cost more than standard stamped washers but bring value in critical applications.
• Inspection & certificationFor regulated industries, ensure traceability and quality documentation.

Our team at Pattern Fasteners is happy to discuss your requirements, provide samples or quotes and help determine if a machined washer is the optimal choice over a standard stamped washer.

Why Choose Pattern Fasteners

• Dedicated turning and machining facilities enabling high precision and flexibility.
• Expertise in producing high-performance custom washers and turned parts.
• Reliable lead-times, robust quality systems and responsive service.
• Strong track record in serving aerospace, defence, energy and precision industry markets.
• Transparent communication and support from specification through to delivery.

Machined Washers — Frequently Asked Questions

1. What is a machined washer?
A machined washer (also known as a turned washer) is a washer produced from solid bar stock using CNC or manual turning processes. This creates a stronger, more precise component than stamped washers and allows for tighter tolerances and custom dimensions.

2. What materials can machined washers be made from?
At Pattern Fasteners, machined washers can be produced in stainless steel, mild steel, aluminium, brass, titanium, and other specialist alloys such as Inconel or Monel. We can also provide BS EN 10204 3.1 material certificates for full traceability.

3. When should I choose a machined washer over a standard washer?
Choose machined washers when you require exceptional strength, precision, or material control — for example in aerospace, hydraulic, or marine applications where load distribution, vibration resistance, and surface finish are critical.

4. What sizes are available?
We manufacture machined washers in a wide size range — typically from 2 mm to 200 mm diameter, though custom sizes outside this range are available on request.

5. Can you supply machined washers in small or large quantities?
Yes. We manufacture both low-volume prototypes and high-volume production runs thanks to our flexible in-house machining capabilities.

6. What finishes or coatings are available?
We offer a full range of finishes including turned, polished, plated (zinc, nickel), phosphate, anodised, and passivated surfaces — all applied to meet customer or industry standards.

7. Do machined washers come with quality documentation?
Yes, we provide full inspection reports, certificates of conformity, and BS EN 10204 3.1 mill certificates where required, ensuring every washer meets its specified quality standards.