For quick assembly of cubes (3D), we recommend this type I cube connector. The model is delivered with cover caps. For fastening you need the countersunk screw DIN 7991 M8x20..
Product data cube connector 40-3D I-type slot 8 at a glance:
Size: 40 x 40 x 40
Scope of delivery: only the connector with the cover caps.
Design: die-cast aluminium, with cover caps.
Suitable for: quick assembly of cubes (3D)