Schlage 3CB1 4.5 X 4.5 646 3-Knuckle Concealed Bearing Standard Weight Full Mortise Butt Hinge, Satin Nickel

Deliver secure, reliable door performance where it matters most — entryways, access-controlled areas, and monitored facilities. The Schlage full-mortise butt hinge 3CB1 is engineered as a 3-knuckle, concealed-bearing hinge that gives smooth, low-noise operation and long-term durability for security doors. Sized at 4-1/2" x 4-1/2" with an 8-wire configuration, this standard-weight hinge installs easily on typical commercial doors and helps maintain precise alignment under heavy use.

Finished in satin nickel for corrosion resistance and a professional aesthetic, the hinge keeps doors operating quietly and securely — an important benefit for surveillance and monitoring environments where door function supports overall security systems. The concealed bearing and 3-knuckle design reduce visible wear and minimize the need for frequent maintenance, improving uptime in busy facilities.

Specify the Schlage 3CB1 4.5 x 4.5 full-mortise hinge for durable, tamper-resistant performance on interior and exterior security doors. Ideal for commercial, institutional, and access-controlled installations — order now to upgrade your door hardware and support your security infrastructure.

• Ensures smooth, reliable door operation for high-traffic and security-sensitive areas with concealed-bearing stability
• Concealed 3-knuckle design reduces wear and noise, lowering maintenance and downtime for monitored entryways
• Satin nickel finish offers corrosion resistance and a professional appearance that complements security and surveillance installations
• Standard 4-1/2" x 4-1/2" size and 8-wire configuration provide easy retrofit and consistent alignment for full-mortise doors
• Durable, standard-weight construction delivers long service life for commercial doors, access control points, and perimeter security applications