BB454-4-1/2" x 4" Full Mortise Hinge

Usually Ships: 1-3 Business Days

BB454 4-1/2 x 4-Inch Standard-Weight Ball-Bearing Hinge

Our BB454 full-mortise hinge combines a 4-1/2 x 4-inch size, .134-inch leaf thickness, and two ball bearings. This standard-weight template hinge is an option for compatible commercial doors where the actual door duty and hardware schedule call for standard-weight ball-bearing construction.

Specifications and Ordering

• Model: BB454.
• Size: 4-1/2 x 4 inches.
• Thickness: .134 inch.
• Type: Standard weight, two ball bearings, five-knuckle full-mortise template hinge.
• Mounting: One leaf recessed into the door and one into the frame.
• Current finishes: US26D Satin Chrome, US32D Satin Stainless Steel, US26 Bright Chrome, US10A, US10B Antique Bronze Oiled, US1 Matte Black, US3 Bright Brass, US4 Satin Brass, and USP Primed Gray.
• Order unit: Priced and sold individually as each; catalog inner-box quantity is three hinges. One each is not automatically a three-hinge set.

Practical Uses

Evaluate our BB454 for medium-frequency commercial openings and compatible replacements specified for standard-weight bearing hardware. Check door size, weight, closer forces, environment, and required hinge count before choosing the model. Standard weight is not the same as heavy weight even when nominal height and width match.

Everyday example: A technician replacing worn office-door hinges measures the 4-1/2 x 4-inch leaves and verifies the .134-inch preparation. They compare the exact BB454 drawing with the screw pattern and reinforcement, install aligned hinges, and check the swing, closer, and latch together. Loose mounting material or an out-of-square frame is repaired separately.

Installation Checks

• Verify preparation: Match mortise dimensions and depth, corner geometry, screw pattern, and reinforcement.
• Coordinate the opening: Confirm door duty, closer forces, hinge quantity, spacing, and clearances.
• Follow the exact template: Do not assume another 4-1/2 x 4-inch model has the same thickness or preparation.
• Match fasteners: The template references #12-24 x 1/2-inch machine screws and #12 x 1-1/4-inch wood screws. Follow the supplied hardware and approved substrate preparation.
• Align and test: Seat leaves correctly, align hinge axes, and check free swing, gaps, secure fastening, closer action, and latch engagement.

Materials, Pin Security and Rated Openings

Confirm the actual specified material as well as the finish. Our architectural hinge family includes steel, stainless steel, and separately specified brass constructions. Plating does not make steel rustproof.

NRP means non-removable pin, a retaining provision that prevents pin removal with the door closed. Verify this separately where required, especially for exposed pins on outswing doors. Do not assume NRP or special pins and tips are included in an unmarked selection.

Our commercial catalog identifies UL-listed steel and stainless-steel BB454 hinges for swinging fire doors, with a 3-hour reference. Confirm the exact listed hardware, fasteners, preparation, and approved complete assembly. Do not transfer that reference to brass or treat a hinge alone as proof of an opening's rating.

Problems It Helps Address

• Standard-weight bearing requirements: Provides the documented two-bearing, .134-inch configuration.
• Replacement matching: Identifies the model's size, thickness, and preparation reference.
• Worn hinge movement: A properly matched replacement can help restore consistent operation when the opening and mounting points are sound.
• Finish coordination: Offers the listed finishes while keeping actual material selection separate.

Care and Matching Template

Inspect fastening, alignment, bearings, finish condition, and gaps periodically. Correct sagging or binding rather than forcing operation. Follow the supplied maintenance instructions and use finish-appropriate cleaning methods.

BB454 Standard-Weight 4-1/2 x 4-Inch Hinge Template

Finish Reference Images