Extra Large Metal Embossed Turn Button Clip Dark Black – U18 Complete Guide
The Extra Large Metal Embossed Turn Button Clip Dark Black (SKU: U18) is the largest clip in XKY Framing’s embossed series. With a 10.5 mm wide head, 21.5 mm total length, and distinctive dark black finish, it provides maximum backing retention for oversized and heavy-format picture frames.
Why Choose the Extra Large Metal Embossed Turn Button Clip Dark Black?
As frame size increases, the stress on each backing clip increases proportionally. The U18’s 10.5 mm wide head distributes screw pull-out force over a larger area, reducing the risk of wood splitting in the moulding, while the 8.5 mm wide tail provides a broad, stable locking surface against the backing board edge.
Key Dimensions
Total length: 21.5 mm. Head width: 10.5 mm. Tail width: 8.5 mm. Hole diameter: 3 mm. Thickness: 0.3 mm.
Installation
Pre-drill 3 mm pilot hole. Seat backing board. Fasten with M3 screw to 0.3 N·m. Rotate to lock using embossed texture. Use 12+ clips for frames over 100 × 80 cm.
Related Products
For large embossed black see U15 Large Embossed Turn Button Clip Black. For melon-seed arch clip see U19 Metal Melon-Seed Arch Turn Button Clip.
Material & Finish
0.3 mm cold-rolled steel, dark black (warm matte) electrophoretic coating.
FAQ
Q: What is the keyhole shape?
A: Rounded head tapering to wider oval tail, providing broad locking contact.
Q: How wide is the U18 head?
A: 10.5 mm — the widest in the embossed series.
Q: Is dark black the same as matte black?
A: Dark black has a slightly warmer appearance — more refined on dark hardwood frames.
