Cylinder Backset:  7/8", 31/32”, 1-1/8” or 1-1/2” only.

Case:  Steel with corrosion-resistant plating.  1“ x 5-13/16” x depth. (Depth varies by backset.)

Function:  Flexibility of traffic control during and after business hours is offered by 4510 Series Deadlatches. A reverse turn of the key while bolt is held retracted retains the bolt, to allow twoway traffic for hospitals, banks, stores and other buildings which require free entrance at certain times and exit-only at other times. Interchangeable, without stile modification, with any MS1850A or MS1850S deadbolt of same backset and faceplate shape. (They do not, however, provide the same maximum security level as the MS® Deadbolt.)

Latch Bolt:  1/2“ x 1” x 1/2” throw. All metal with hardened steel internal pins. Handing is reversible without special tools.

Auxiliary Bolt:  All metal. Deadlocks latch bolt to prevent “loiding” or case-knife entry.

Strikes:  Standard strike furnished is 4902-01 for flat jamb where door closes flush or nearly flush. Also available: radius strike for opposite stile in paired doors; longer strike (4901) to cover slot strike of MS® lock; long lip strikes for center-hung doors.

Operation:  Turn key or operate handle to retract spring-loaded latch bolt. To hold bolt retracted, push it in and secure by reverse turn of key. Uses any standard mortise cylinder with MS® cam.

Options:  Backset, Faceplate Shape, Finish, Strike and Handing must be specified when ordering.

Certification:  ANSI/BHMA Type E8231 (Grade 1)