Size:M4-0.7 x 12mm

Are you still bothering about the fasteners?
These wing bolt would be the best choice for you to solve the problem.
Twisting the bolt by hand, you can fasten two parts(structures)together easily.
High quality, clean and nice surface and it threads smoothly. A good replacement for a setscrew on a mini clamp so you wouldn't need to use a screwdriver in the heat of a photo shoot.

Specification:
Product Name: Wing Butterfly Bolt
Material: Carbon Steel Zinc Plating
Thread Size:M4
Thread Pitch: 0.7mm
Thread Length: 12mm
Measurement System:Metric
Package Content: 20pcs x Wing Butterfly Bolt

Description:
1. Material: Carbon Steel Zinc Plating
2. Usage: Twist the screw by hand without any other tools, easy to install.
3. Feature: Special wing design, increase the lateral bearing surface and makes it eaiser to fasten, can be used repeatedly.
4. Applications: Machinery and equipment, electronic equipment, communications equipment, hardware lighting, building bridges, furniture decoration which require insulation, frequent dis-assembly and maintenance.