Companion Flange adapter designed for use with 1310 U-Joints. This part bolts to a 1310 series companion flange style yoke - as used on Currie High pinion 3rd. members, and adapts it to a standard 1310 u-joint. This part may also be used on yokes supplied in the Currie 231 transfer case tailshaft slip yoke eliminator kits. Includes the metric socket head allen bolts and lock washers that would be necessary to bolt it to the rearend yoke.