Are you still bothering about the fasteners?
These wing screw would be the best choice for you to solve the problem. Twisting the screw by hand, you can fasten two parts(structures)together easily.

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

Specification:
Product Name: Wing Butterfly Screw
Material: Carbon Steel
Finish: Zinc Plated
Thread Size: M4 x 10mm / 0.16-inch x 0.39-inch(D*L)
Thread Pitch: 0.7mm
Overall Size: 22mm x 20.5mm x 9mm / 0.87" x 0.81" x 0.35"(L*W*T)
Main Color: Silver Tone
Weight: 40g

Package Content: 10pcs x Wing Butterfly Screw