The screw for the type of aircraft is M3.5*53mm.

The screw that matches the type of butterfly is M3.5*60mm.

Size:

A (gray butterfly-shaped anchor): 36 × 20 × 15 mm

Outer diameter of the cover: approximately 13 mm

Opening width: approximately 8-10 mm

Suitable board thickness: about 8-15 mm

B (airplane-shaped anchor in white): 30 × 20.5 mm

The outer diameter of the cover: approximately 50 mm

Opening size: approximately 8-9 mm

Suitable board thickness: about 8-15 mm