Schlage B663 Classroom Deadbolt

The Schlage B663 is the classroom function in the Schlage B600 Series Grade 1 commercial deadbolt line. ANSI Function E0171. The deadbolt is thrown only by a key from the exterior. The deadbolt is retracted by key from the exterior or by thumbturn from the interior. The inside thumbturn can retract the bolt but cannot project it. This is the defining behavior of the classroom deadbolt function and it is distinct from a standard single-cylinder deadbolt. American Locksets is an authorized Allegion Schlage dealer stocking the B663 with same-day shipping and free shipping on orders over $300.

Schlage B663 Classroom Deadbolt: Why the Function Matters

The classroom deadbolt function, ANSI E0171, is specifically designed for K-12, higher education, and institutional doors where lockdown security requirements call for keyed exterior deadbolt control combined with interior thumbturn egress. The critical distinction is that the thumbturn inside can only retract the bolt. It cannot project (throw) the deadbolt. Throwing the deadbolt requires a key from the exterior.

This prevents an occupant inside from deadbolting themselves without authorized key control, which is a requirement in many school security protocols. The teacher or authorized personnel hold the key and control whether the deadbolt is thrown. The thumbturn allows the occupant inside to retract the bolt and exit at any time. On a school lockdown, the deadbolt is thrown by a key from the outside, which cannot be undone from inside without a key.

This is different from the standard B660 single-cylinder deadbolt, where the thumbturn operates the bolt fully in both directions from inside.

Schlage B663 Specifications

• SKU: B663

• ANSI Function: E0171, Classroom Deadbolt. Deadbolt thrown only by key outside. Deadbolt retracted by key outside or thumbturn inside. Thumbturn cannot throw deadbolt

• Series: Schlage B600 Series Grade 1 Deadbolts

• Grade: ANSI/BHMA A156.36-2010 Grade 1. Exceeds Grade 1 strength and operational requirements

• UL/cUL: UL 10B listed standard as auxiliary lock on A label single doors 4 feet x 8 feet. Letter F and UL symbol on latch front indicate listing. UL 437 listed cylinder available by specifying B800 Series cylinder option

• Deadbolt: 1 inch throw, high-strength steel alloy with hardened steel roller insert. Resists sawing and kick-in attacks

• Latch Bolt: Brass, 9/16 inch throw, deadlocking on keyed and exterior functions

• Front: Brass, bronze, or stainless steel. 1-1/8 inch x 2-1/4 inch, square corner, beveled

• Strike: 1-1/8 inch x 2-3/4 inch (32mm x 70mm) with steel reinforcer and two 3-inch screws standard

• Backset: 2-3/4 inch standard. Optional 2-3/8 inch, 3-3/4 inch, and 5 inch available

• Door Thickness: 1-5/8 inch to 2 inch standard (conventional or FSIC). 1-3/4 inch to 2 inch for SFIC. Optional 1-3/8 inch and up to 2-1/2 inch available

• Prep Required: 2-1/8 inch (54mm) bore hole

• Handing: Non-handed

• Security Shield: Metal shield protects bolt from ice-pick attack through door

• Mounting Protection: Hardened steel ball-bearings protect mounting bolts from drill attack

• Frame Reinforcement: Concealed wood frame reinforcer with three 3-inch screws protects wood jambs against kick-in

• Cylinder: 6-pin conventional cylinder with C keyway (Everest C123 standard), nickel silver keys, phosphor bronze springs. SFIC (suffix B) and full-size interchangeable core (suffix R) available

• Available Finishes: 605 Bright Brass, 606 Satin Brass, 609 Antique Brass, 612 Satin Bronze, 613 Oil Rubbed Bronze, 619 Satin Nickel, 625 Bright Chrome, 626 Satin Chrome

Browse all Schlage Grade 1 B600 Series, all Schlage Cylindrical Deadbolts, and the complete Cylindrical Deadbolts catalog at American Locksets.