About this item
The Accentra AU548F is the passage function rose lever trim for Yale and Accentra panic devices- Augusta lever, always free from the outside, no key or cylinder required. If you searched "548f" or "como abrir" (how to open)- this is the trim that makes the outside lever of a panic bar door always active for entry without any key. Accentra is the current brand name for Yale commercial hardware under ASSA ABLOY. The AU548F carries forward directly from the Yale catalog.
"Como Abrir": What This Trim Answers
The Spanish search "como abrir"- "how to open"- lands on this page because a door fitted with the AU548F should always open freely from the outside. If someone is asking how to open a door and finding this product, the answer is: turn the lever. That is the entire operation from outside. No key, no code, no button, no credential. The passage function is the simplest possible outside trim- the lever is active at all times.
If a door with AU548F trim is not opening freely from outside when the lever is turned, the issue is not the trim- it is the exit device body, the mounting, the latch engagement, or the door alignment. The AU548F itself provides no locking mechanism whatsoever.
548F Model String Decoded
AU- Augusta lever. The traditional gently curved institutional lever. The most widely specified lever design in commercial hardware. Non-handed and ADA compliant. Also available as MO548F (Monroe lever) and PB548F (Pacific Beach lever) in the same passage function.
548F- 540F Series rose trim, ANSI function 08 passage. The 540F is the rose trim format- compact circular or rectangular rose plate around the lever base, lower profile than the full escutcheon plate format. Function 08 passage is the always-active lever function- no cylinder, no key required from outside.
The F in 548F designates the fire-listed trim variant. All 540F Series trim carries the F designation for consistency with fire-rated exit device applications.
Passage Function: What "Lever Always Active" Actually Means
The passage function on exit device trim is different from every other trim function- and understanding the difference is what the "como abrir" query is really asking.
Nightlatch (541F)- lever on outside is not directly active. Key in cylinder retracts latch from outside. Without key, lever does not open the door.
Classroom (546F)- cylinder toggles whether the outside lever can operate. When locked by key, lever does not open door. When unlocked by key, lever does.
Passage (548F)- outside lever always retracts latch. No cylinder. No key. No locked state. Anyone approaching from outside can turn the lever and enter at all times. This listing.
The AU548F is specified on doors that must remain freely accessible from outside at all times- building entrances during business hours where no access control is required, vestibule inner doors, lobby corridor doors, push-through maintenance corridors, and any opening where free entry is the design intent and access control is handled by other means (lobby desk, security personnel, separate access-controlled outer door).
The inside is always controlled by the exit device crossbar- pushing the crossbar always allows egress from inside regardless of the outside trim function. That is the fundamental panic hardware requirement: inside egress always free.
No Cylinder Included: Why Passage Trim Ships Without One
The AU548F ships without a cylinder. Passage trim has no cylinder because there is no locking function to control. There is nothing to key, nothing to lock, and nothing that requires a key blank. The lever on the outside face connects mechanically to the latch retraction mechanism without any keyed interface. No keyway slot, no cylinder housing, no key blank selection required.
This is different from the nightlatch (541F) and classroom (546F) versions which ship with a cylinder because their outside lever control is key-operated. If your specification calls for AU548F and your hardware schedule shows "no cylinder"- that is correct for passage function.
540F Rose Trim vs Escutcheon Trim: Which to Specify
The AU548F is rose trim- the 540F series. The rose sits compactly around the lever base. The door face on both sides shows the lever and a small rose plate, with the door surface visible around it.
If the specification calls for a full escutcheon plate- a larger rectangular plate covering more of the door face- the correct passage trim is the AU628F (Augusta lever, escutcheon, passage, for 7000 Series) or the AU448F (for 2100 Series). Rose trim and escutcheon trim are not interchangeable- they attach to the exit device using different mounting geometry.
The AU548F fits 7000 Series and 2100 Series exit devices. If your device is in the 6000 Series, confirm trim compatibility before ordering. Not all trim series are cross-compatible.
Thrubolt Mounting and Physical Specs
The AU548F thrubolts through the door face to the exit device body- the same mechanical principle as all 540F Series trim. The thrubolt connection provides far greater resistance to trim pull-off attacks than surface-screw mounting. The trim body attaches to the exit device case directly, not to the door surface independently.
Lever projection is 2-5/8 inches (61mm) from the door face. Standard door thickness is 1-3/4 inches. For doors through 2-1/4 inches or shim-mounted devices, specify door thickness at order. The Augusta lever is non-handed- the same trim installs on both left-hand and right-hand doors without modification.
540F Series Function Matrix: All Three Functions at a Glance
AU541F- Nightlatch: key outside retracts latch, lever without key does not. Cylinder included.
AU546F- Classroom/Storeroom: key toggles locked/unlocked state of outside lever. Cylinder included.
AU548F- Passage: outside lever always active, no cylinder, always open from outside. No cylinder. This listing.
Specifications
Model: Accentra AU548F / Yale AU548F
Former Brand: Yale (now Accentra, ASSA ABLOY)
Series: 540F Rose Lever Trim
Function: Passage (ANSI F08 / function 14)- outside lever always active, no cylinder, no key required
Lever Style: Augusta (AU)- traditional curved institutional lever, non-handed, ADA compliant
Trim Format: Rose plate (compact, low profile)
Compatible Devices: 7000 Series, 2100 Series exit devices
Cylinder: Not included- passage function requires no cylinder
Projection: 2-5/8" (61mm)
Door Thickness: 1-3/4" standard; through 2-1/4" specify at order
Mounting: Thrubolts to exit device body
Handing: Non-handed
Related Functions: AU541F (nightlatch), AU546F (classroom/storeroom)
Escutcheon Equivalent: AU628F (7000 Series escutcheon passage)
ANSI/BHMA: A156.3 Grade 1
ISO: 9001
Warranty: 3-year limited
Finishes: 626 (satin chrome), 612 (satin bronze), 613 (oil rubbed bronze), 689 (aluminum)
American Locksets has stocked Accentra and Yale exit device trim since 2001.
Trusted Since 2001
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