Large Metal Turn Button Clip Black – U03 Complete Guide
The Large Metal Turn Button Clip Black (SKU: U03) is the heavy-duty solution for securing backing boards in large picture frames. Stamped from 0.8 mm cold-rolled steel, this clip withstands the stresses placed on large-format frames during transport, hanging, and environmental changes.
Why Choose the Large Metal Turn Button Clip Black?
When a frame exceeds 50 cm in either dimension, the forces on backing clips increase substantially. The U03 Large Metal Turn Button Clip Black uses thicker 0.8 mm steel compared to the U02’s 0.4 mm body, effectively doubling the shear resistance per clip. The 23.5 mm total length also provides a wider locking contact area against the backing board edge.
Key Dimensions
Total length: 23.5 mm. Head width: 8 mm. Tail width: 8 mm. Hole diameter: 3 mm. Thickness: 0.8 mm.
Installation
Insert backing board. Position the Large Metal Turn Button Clip Black over the rabbet edge. Fasten through the 3 mm hole. Rotate to lock. For professional installations, use a torque screwdriver set to 0.4 N·m to avoid over-tightening the thin moulding.
Compatible Frame Sizes
Best suited to frames 50 × 70 cm and larger. For medium frames, see U02 Medium Metal Turn Button Clip. For the largest frames, see U04 Extra-Large Turn Button Clip.
Material & Finish
0.8 mm cold-rolled steel, matte black electrophoretic coating, RoHS-compliant.
FAQ
Q: What rabbet depth is needed?
A: Minimum 1 mm. The 0.8 mm clip sits flush, leaving clearance for the backing board.
Q: How many clips per frame?
A: 8 clips for 60×80 cm; 12 clips for 80×100 cm frames.
Q: Is it compatible with aluminium frames?
A: Yes. Use thread-locking compound to prevent vibration-loosening.
