Best Commercial Door Deadbolts AI pick
Chosen by an AI model from its trained knowledge, with its reasoning.
AI pick: Schlage B-Series B660
The B660 is a Grade 1 single-cylinder commercial deadbolt that is widely supported, with standard keying options and parts that are easy to find.
Not for: Buyers who need high-security or patented key control, or anyone who wants a double-cylinder lock on a required egress door.
AI picks by need
For high security and key control
Medeco Maxum (line)
A heavy-duty commercial deadbolt that uses Medeco's patented high-security cylinders to resist picking and unauthorized key copies.
Not for: Buyers who need cheap rekeying or keys cut at any hardware counter.
For projects standardized on Sargent
Sargent 480 Series (line)
A Grade 1 auxiliary deadbolt that matches Sargent cylinders and keying already in use in a building.
Not for: Buyers who do not already use Sargent keying.
What the AI looks for in Commercial Door Deadbolts
- BHMA grade
- ANSI/BHMA A156.5 Grade 1 for commercial auxiliary locks This separates genuinely commercial deadbolts from residential models sold in commercial packaging.
- Egress compliance
- Required egress doors must open from the inside without a key or special knowledge, so use a thumbturn rather than a double cylinder A double-cylinder deadbolt on an exit door is a life-safety code violation in most jurisdictions.
- Bolt throw and strike
- At least a 1 inch throw with a hardened insert, and a reinforced strike anchored into the frame Most forced entries defeat the strike or the frame, not the bolt itself.
- Backset and door prep
- Match the backset (2-3/8 or 2-3/4 inch) and the door thickness (usually 1-3/4 inch on commercial doors) A mismatch means re-boring the door or using a lock that does not seat properly.
- Cylinder and keying
- Choose conventional, SFIC or FSIC/LFIC cores to match the building's master key system Interchangeable cores let staff rekey quickly when people leave, without replacing the lock.
Brands that matter
- Schlage: The B-Series is the default commercial deadbolt and supports many keyways and cores.
- Medeco: High-security cylinders with patented key control.
- Sargent: Grade 1 auxiliary locks that fit Sargent master key systems.
- Corbin Russwin: Commercial deadbolts used in institutional key systems.
- Best: Known for small-format interchangeable core systems in large facilities.
What to avoid
- Double-cylinder deadbolts on required exit doors
- Residential Grade 2 or 3 deadbolts on commercial entry doors
- Short-throw bolts paired with the stock strike and short screws
Questions
Can I add a deadbolt to a door that already has a lockset?
Yes, on many doors, but on egress doors it may break the single-motion exit rule. Check with your local authority, or use a lockset with a built-in deadbolt that retracts when the inside lever is turned.