3901 - Single Cylinder (External)


For use with ASSA Modular, Rim, Connect and Narrow Profile lock cases.


Securing of Cylinder:

The cylinder is fixed to the lock case with two hardened steel screws, supplied with the accessory set.
ASSA accessories must be used.

Cylinder Features:

  • Drill Protection as Standard - 5 minutes drilling resistance
  • Enhanced plug pulling resistance
  • Paracentric key way for resistance to picking and manipulation of system pins
  • Bumping resistance



Available in satin chrome finish


Cylinders for Locks

Tested in accordance with BS EN 1303:2015



1 6 0 B 0 C 6 D*



 *when used with appropriate security escutcheon



Fire Rated

Tested in accordance with BS EN 1634-1:2000

Product range is suitable for use on fire resistant and smoke control doors.