Here is a list of known compatible diabolos. This list is far from definitive, but covers the majority of diabolos on the European market today.
Compatible diabolos
PassePasse: Mini Genius, Cloudbuster, Tribolo, Genius.
Playback: Astra, Comet, DLC2.
Henrys: Jazz, Vision, Circus.
Mr. Babache: Harlequin, Medium Harlequin, Aigle.
And much more.
Diabolos incompatibility
Sundia, Tiabolo, MHD, Glary (use all 4mm bolts)
Some other Mr. Babache diabolos like the Tornado and Finesse which use Socket screws also known as the Allen head which are secured with a hex Allen wrench.
Please note that this pair of M6 Nuts LED is sold without Diabolo! All photos are simply showing you the effect when mounted on a diabolo. If you want to buy this product already installed on a diabolo please search Passepasse M6 Diabolos on this site