Compound Cross AxlesA Compound Cross Axle is a standard cross axle modified at one end to include a stop bush of some sort. Initially released in the late 1990's they are becoming rather common in Technic construction.
|6587||Cross axle w/ stud, 3.2L
Technic Axle 3 with Stud LD. PR
|Cross axle w/ collar, 5.2L|
|552||Technic Axle 5.5 with Stop LD, PR
1999-present. This element originally appeared in 1998 Znap sets.
US patent D409,677
|2637||Cross axle w/ connector holes, 18L
Technic Link 16L LD, PR
1995-present. This element has appeared in various colors
and sizes in other non-technic sets.