E27/B22 Lamp Holder to Harp Finial Converting Washers (pair)

E27 or B22  Lamp Holder to  Harp Finial  Converting Washers – ShadeCore®

Our premium ShadeCore® converting washers provide a simple way to adapt a standard lampshade frame for use with a harp and finial fitting system, a style of lampshade support commonly found on table and floor lamps in the USA.

They are designed for lampshade frames featuring an E27 Edison Screw utility fitting or UNO fitter, with a centre-hole diameter of approximately 40 mm. When used with our E27/E26 to B22/E14 Lampshade Reducer/Converter Adapter, the washers allow the lampshade to be securely positioned on a compatible harp fitting and held in place with a decorative finial.

This useful conversion system makes it easier to pair a standard European- or UK-style lampshade frame with an American-style lamp base, giving you greater flexibility when making, replacing or restoring a lampshade.

You can rely on ShadeCore® carreirs for strength, accuracy, and professional results every time.

About ShadeCore®  

It is our brand of lampshade ring sets and frames, made for makers who demand quality, consistent sizing, and professional performance.
Trusted by manufacturers and makers worldwide, our frames serve as the foundation for products in quality retailers, interior design, and commercial lighting projects. ShadeCore® delivers dependable performance every time.

How do I use a Converter?

1. Squeeze the Adapter and install into the centre of the lampshade frame to reduce the aperture.
2. Insert a Converting Washer onto the stem of the Harp System.
3. Place your Lampshade onto the thread of the Harp System, ensuring the washer fits into the ridge of the Adapter.
4. Place the other Converting Washer on top of the Adapter, fit into the ridge, and then screw on your Finial.
5. Your lampshade can now be used with Harp Systems

What’s Included

• 2 x Converting Washers - 34mm Diameter with 10mm Inner hole - Nylon

Key Features and Benefits

• Precision-made converting washers for professional lampshade production
• Strong nylon construction
• 34mm diameter washer compatible with our finial converter system
• Compatible with UK, European, and selected US fittings

Specifications

Important Notes

There are two standard sizes for Harp systems, 1/4" and 3/8" our Converting Washers will fit them both.
Below is a conversion chart with imperial and metric measurements.

Conversion Chart

Our system works with these sizes, but If the Harp stem is bigger, you can make the hole in the washer bigger to fit.

About the Manufacturer

Trusted worldwide by professional makers, workshops, manufacturers, specifiers and interior designers,
Dannells offers a comprehensive range of products backed by decades of industry experience.
We supply high-quality materials and support makers at every stage, from initial projects through to large-scale production.
Our team provides expert technical advice and product guidance to help ensure consistent, reliable and professional results.
Dannells are committed to quality, reliability and dependable service, ensuring every order meets professional standards and production workflows.

We value all our customers and support their projects at every step.

Support & Community

At Dannells, we support customers at every level, from first-time makers to professional manufacturers.
We’re always happy to offer friendly advice, technical guidance, and practical help whenever you need it.
We also provide a wide range of online tutorials and videos to help you get the most from our products and tackle common lampshade-making challenges.
If you have a question, need help with a problem, or just want some reassurance before starting a project, give us a call or send us an email.

Our team will always do their best to help in any way they can.

Our YouTube tutorial library is full of practical tips, techniques, and solutions to help you build confidence and improve your lampshade-making skills.
The secret every lampshade maker should know is to join the Dannells Lampshade Makers Forum.
This creative community of over 7,500 makers worldwide shares ideas, solves problems, swaps techniques, and inspires each other every day.
Whether you’re just starting out or refining your craft, you’ll always find support, inspiration, and people who truly want to help, and it is completely free to join.

Related Products

To enhance your finished lampshade, take a look at our diffusers, metallic lining upgrades, digital print options, cellophane wrap and wattage labels.

See related products below.