The Falcon 24-031 is the OEM conventional cylinder for the inside position on Falcon T Series Grade 1 cylindrical locks, compatible with all T Series functions except the T571 (dormitory) and T381 (classroom security) functions. If the lock installed is a T571 or T381, the inside cylinder position requires a different part. Confirm the exact function before ordering.

This is the cylinder used in the inside rose assembly when the T Series lock function requires a keyed inside cylinder. On most T Series functions, the outside cylinder handles primary keyed entry and egress control, while the inside cylinder- when used at all- provides secondary key override, thumbturn-based deadbolt operation, or emergency key release depending on the specific function ordered.

Schlage Conventional Cylinder vs Falcon 24-031: Understanding the Difference

One GSC keyword driving traffic to this page is "Schlage cylinder replacement," and that connection is real. The Falcon T Series is notable in the industry because it accepts any manufacturer's cylinder in the outside position- it's marketed as the most versatile cylindrical lock specifically because you can drop in Schlage, Best, Arrow, Corbin Russwin, Yale, and most other conventional or SFIC cylinders without modification to the lock chassis. That versatility is what makes the T Series a go-to for facility managers maintaining mixed-brand key systems.

The 24-031, however, is the Falcon OEM cylinder. It's the factory-shipped cylinder for the inside position in standard T Series configurations, machined from solid brass housing and plug with phosphor bronze springs, drilled with 6-pin chambers keyed in 5 pins as standard (6-pin pinning available on specification). The standard keyway is Falcon's G keyway- Falcon's open keyway offered on all conventional cylinders. Available keyways for the T Series include G (standard), E, H, K, L, N, and P open keyways, and Schlage C keyway for installations that need to interlock with an existing Schlage master key system.

Falcon T Series Cylinder Specifications

The Falcon T Series meets ANSI/BHMA A156.2, Series 4000, Grade 1 and is UL listed for 3-hour fire door assemblies. The cylinder housing and plugs are machined solid brass. The 24-031 ships keyed differently (KD) as the default configuration. Master keying is available on request, and the Falcon T Series supports multi-level master key systems using Falcon's A2 bitting system (depths 0–9).

The cylinder assembly is removable for rekeying- one of the T Series' defining features. The compression spring behind the cylinder in the T Series was redesigned specifically to create a tighter, more secure cylinder retention that eliminated lever sag while still allowing cylinder removal without disassembling the lock from the door. This removability means a facility locksmith can pull and replace the 24-031 inside cylinder in the field without removing trim from the door.

Why T571 and T381 Functions Use a Different Cylinder

The T571 dormitory function and T381 classroom security function have distinct inside mechanism configurations that require a different cylinder assembly for the inside position. The T571 dormitory function uses push-button locking from inside with the outside lever always rigid unless released by key- the inside mechanism interacts with the emergency release differently than standard functions. The T381 classroom security function has a specific inside cylinder arrangement tied to its emergency egress and security indicator requirements.

All other T Series functions- including T101 (passage), T191 (storeroom), T281 (privacy), T381X variations, T451 (entrance/office), T471 (office), and T501/T511 (entry)- use the 24-031 for the inside cylinder position.