No, the 33A is not compatible with the AD and CO 993 chassis units. The 33A can only be driven in a clockwise direction. This would restrict it to right hand installs only.
The part number for the AD or CO twisted tailpiece kit is: 46929303
Tailpiece Kit - (for Exterior Escutcheon -993 into Exit Device, i.e. Von Duprin 98 or 99)
Exit Trim
46929303 Includes the...
- AD Series and CO series products require that the Night Latch (NL) screw is installed in the exit device. Be sure this screw is installed- Exit hardware and strike must be properly mounted ...