The Falcon A30760-001-00 is the OEM chassis assembly for the Falcon T581-IC cylindrical lock, documented as Item 1 in the T581-IC parts breakdown of the Falcon T Series Service Manual (Allegion doc 108002). This is the storeroom function chassis configured specifically for Interchangeable Core (IC) cylinders - not the standard conventional cylinder version. The IC configuration includes a different spindle: Item 33 in the service manual parts list (030732-001-00) is the 2-ear IC spindle, which interfaces with the IC throw member to transmit core rotation to the latch retraction mechanism. The conventional T581 uses a different spindle (030733-000-55) that is not IC-compatible.

Confirm the installed lock is the T581-IC before ordering. The T581-IC chassis is not a drop-in replacement for the standard T581 conventional cylinder chassis - the spindle geometry is specific to the IC format.

What the T581 Storeroom Function Does

The T581 is ANSI F84 Storeroom - one of the most restrictive keyed functions in the Falcon T Series catalog. The outside lever is mechanically locked at all times. There is no inside push button, no inside privacy mechanism, and no way to unlock the outside lever from the inside. To enter from outside, the correct key is required every single time. The inside lever is always free - it retracts the latch immediately for egress regardless of the lock state. That inside lever freedom is a life safety requirement: no storeroom function can trap an occupant inside.

This is the key distinction between the T581 and similar T Series functions. The T521 (office function) has an inside push button that creates a locked state - it can be unlocked from inside by turning the lever. The T581 has no such mechanism. The outside is always controlled by key, period. For server rooms, pharmaceutical storage, evidence rooms, secure archives, and utility rooms where unauthorized entry must be prevented at all times, the T581 is the correct specification.

Falcon T581 IC Chassis: Full Parts Breakdown from the Service Manual

The Falcon T Series Service Manual documents 14 individually orderable components for the T581-IC assembly. The chassis assembly itself (A30760-001-00, Item 1) is the primary mechanical housing. The other components available as separate field parts:

Flanged nuts (030726-000-30, 2 required), outer mounting plate (030712-001-30), #8-32 self-tapping screw (031533-006-30), hub and housing assembly (A30746-000-00), spindle (030733-000-55), retractor (022106-002-55), retractor inserts (022986-001-50, 2 required), retractor springs (24064511, 2 required), retractor spring retainer (022112-000-30), hub and plate assembly (A30747-000-00), housing case (24061772), cotter pins (002893-000-60, 2 required), inner mounting plate (030712-000-30), and the IC-specific 2-ear spindle (030732-001-00, Item 33).

The retractor and retractor spring are the most commonly replaced components in storeroom function locks experiencing sluggish outside lever response - when the key is turned and the lever feels stiff or doesn't return cleanly, the retractor spring is typically the worn component.

Falcon Cylindrical Lock Catalog: T581 IC vs T881 IC

Both the T581 and T881 are storeroom-function locks in the Falcon T Series IC catalog. The function behavior is identical: outside lever always locked, key required, inside lever always free. The T881-IC adds an electrified function - a solenoid or motor module integrated into the chassis allows the electric signal to release the outside lever for access control integration without a key. The A30760-001-00 is the purely mechanical version. If the installed lock connects to an access control panel for remote unlock, the T881-IC chassis applies. If the lock is key-only with no electrical connection, T581-IC is correct.

For the complete Falcon T Series IC cylindrical lock chassis and parts catalog, SecurityParts stocks OEM components.