The Schlage 09-060 is the OEM Sargent KIL (Key-In-Lever) tailpiece for the Schlage ALX Series cylindrical lock, specified as the L-SA cylinder configuration in the Schlage ALX configuration poster (document 113368). It enables Sargent key-in-lever cylinders to operate correctly in ALX Series functions 50 (entrance/office), 53 (entrance with indicator), and 80 (storeroom) -the three keyed functions in the ALX catalog that require an outside cylinder. The cylinder is sold separately and is not included with this tailpiece.

This tailpiece is a single-piece field component. Cylinders are not included, and the finish must be confirmed against the cylinder finish specification when ordering the complete configured lock.

Schlage Cylinder Tailpiece: What the 09-060 Does in an ALX Lock

The KIL cylinder in any commercial cylindrical lock sits inside the outside lever housing. The back face of the cylinder plug has a tailpiece -a flat, profiled steel piece that extends rearward and interfaces with the lock hub inside the chassis. When a correct key is inserted and turned, the plug rotates and the tailpiece rotates with it, driving the hub to retract the latch bolt or release the locking cam.

Every cylinder brand uses a slightly different tailpiece geometry. Schlage cylinders use the Schlage tailpiece profile. Sargent key-in-lever cylinders use the Sargent KIL tailpiece profile. The ALX Series lock is designed to accept the Sargent cylinder format -the lever housing has the correct KIL cutout diameter to accept a Sargent cylinder. But the Sargent cylinder's tailpiece geometry does not natively engage the Schlage ALX chassis hub. The 09-060 Sargent KIL tailpiece bridges that gap: it installs on the back of the Sargent cylinder and provides the correct geometry to engage the ALX chassis hub and transmit rotation from the Sargent plug to the Schlage latch mechanism.

Without the correct tailpiece seated, the Sargent cylinder will turn freely inside the ALX lock without operating the latch. With the 09-060 installed, the Sargent cylinder operates the ALX lock chassis exactly as a Schlage cylinder would.

Why Facilities Specify Sargent Cylinders in Schlage ALX Locks

The primary reason is existing key system continuity. Large institutions -school districts, hospital systems, government facilities, universities -invest significantly in master key systems built around a specific cylinder brand. When a building's existing master key system is keyed to Sargent cylinders, specifying new Schlage ALX locks with Sargent KIL cylinders (using the 09-060 tailpiece) allows all new hardware to integrate into the existing key hierarchy without replacing the master key system or rekeying existing locks.

This is standard practice in commercial lock specification: the ALX Series, like the ND Series, is explicitly designed to accept competitor cylinders using the correct tailpiece. Schlage documents this capability on the official ALX configuration poster and in the Schlage Mechanical Price Book.

Schlage Commercial Cylindrical Lock: ALX Competitor Cylinder Tailpiece Family

The 09-060 is one of five competitor cylinder tailpieces documented for the ALX Series in the Schlage ALX configuration poster. All five cover functions 50, 53, and 80:

09-060 (this product) = Sargent KIL, L-SA configuration. 10-140 = Corbin Russwin KIL, L-CO configuration. 09-063 = Sargent LFIC (Large Format Interchangeable Core), J-SA configuration. 09-062 = Corbin LFIC 6-pin, J-CO6 configuration. 10-141 = Corbin LFIC 7-pin, J-CO7 configuration.

KIL (Key-In-Lever) tailpieces (09-060 and 10-140) are for conventional cylinders that remain in the lever housing during normal operation. LFIC tailpieces (09-063, 09-062, 10-141) are for large format interchangeable core cylinders that can be removed with a control key without disassembling the lock.