P601 - Single Cylinder (Outside) Application For use with ASSA Modular, Rim, Connect and Narrow Profile lockcases. Specification The cylinder is fixed to the lockcase with two hardened steel screws, supplied with the accessory set. ASSA accessories must be used. Finish Standards P602 - Double Cylinder P607 - Single Rim Cylinder (Outside) P3607 - Single Rim Cylinder (Inside)