Large Black Arch Turn Button Clip – U13 Complete Guide
The Large Black Arch Turn Button Clip (SKU: U13) brings the spring-action arch mechanism of the U12 to frames that demand a dark finish. Its 6 mm narrow tail and 3 mm arch deliver precise, tool-free backing retention for dark-stained, black, or ebony picture frames.
Why Choose the Large Black Arch Turn Button Clip?
The 3 mm arch in the U13 Large Black Arch Turn Button Clip creates spring clamping force automatically upon rotation. This eliminates the need for precise torque control, reduces installation time, and ensures a consistent, rattle-free backing for every frame.
Key Dimensions
Total length: 24.8 mm. Head width: 8 mm. Tail width: 6 mm. Hole diameter: 3 mm. Thickness: 0.3 mm. Arch height: 3 mm.
Installation
Same as U12. Fasten finger-tight with M3 screw. Rotate to lock. The arch springs automatically. Open by finger rotation — no tools needed.
Related Products
For silver arch see U12 Large Silver Arch Turn Button Clip. For small embossed clips see U14 Small Embossed Turn Button Clip.
Material & Finish
0.3 mm spring-grade steel, matte black electrophoretic coating.
FAQ
Q: Tail width difference between U12 and U13?
A: U12 is 7 mm; U13 is 6 mm for more precise placement in tight rabbets.
Q: Can the clip be opened without tools?
A: Yes, finger pressure is sufficient to rotate to open position.
Q: Suitable for conservation framing?
A: Yes. Controlled spring force does not over-stress delicate mouldings.
