Commercial Mortise Thumbturn Cylinder | Solid Brass | Keyless Interior Operation | Multiple Finish Options

Provide convenient keyless interior operation on compatible mortise locks with this 1-1/8" Brass Mortise Thumb Turn Cylinder.

Designed for commercial door hardware applications, this thumbturn-style mortise cylinder allows the lock mechanism to be operated by hand rather than with a key from the thumbturn side.

Constructed from durable solid brass, it is ideal for storefront locks, commercial mortise locks, deadlocks, and other compatible threaded mortise-cylinder applications.

Key Features

• 1-1/8" mortise cylinder length

• Solid brass construction

• Thumbturn operation

• No key required from the thumbturn side

• Commercial-grade replacement cylinder

• Standard threaded mortise-cylinder design

• Ideal for interior lock operation

• Suitable for commercial storefront and mortise lock applications

• Excellent for replacement and retrofit projects

• Available in multiple architectural finishes

Available Finishes

Common configurations include:

• 26D / 626 Satin Chrome

• 10B / 613 Dark Bronze

Select the finish that best matches the surrounding lock, trim, and architectural hardware.

Thumbturn Operation

Unlike a conventional keyed mortise cylinder, this configuration uses a thumbturn to operate the lock mechanism.

This allows the user to lock or unlock the compatible hardware from the thumbturn side without inserting a key.

Ideal for applications where convenient interior operation is preferred.

1-1/8" Cylinder Length

The cylinder body measures:

1-1/8"

This is a common commercial mortise-cylinder length used in storefront locks, mortise locks, deadlocks, and other compatible commercial hardware.

Always verify the required cylinder length before ordering.

Common Applications

Ideal for:

• Aluminum storefront doors

• Mortise locks

• Storefront deadlocks

• Hookbolt locks

• Deadlatches

• Commercial entrance doors

• Interior thumbturn applications

• Office buildings

• Retail facilities

• Schools

• Commercial facilities

• Institutional buildings

Solid Brass Construction

The cylinder body is constructed from durable brass for dependable commercial use.

Solid brass provides:

• Long service life

• Reliable threaded engagement

• Smooth thumbturn operation

• Corrosion resistance

• Durable commercial performance

Product Specifications

Product Type: Mortise Thumb Turn Cylinder
Cylinder Length: 1-1/8"
Material: Solid Brass
Operation: Thumbturn
Key Required: No
Cylinder Style: Threaded Mortise Cylinder
Finish Options: Satin Chrome / Dark Bronze
Application: Commercial Door Locks
Use: Replacement / Retrofit / New Installation

Replacement Applications

Use this cylinder when:

• Existing thumbturn is damaged

• Cylinder threads are worn

• A keyed cylinder is being converted to thumbturn operation

• Existing hardware is being refinished

• A storefront lock is being repaired

• A commercial mortise lock requires replacement hardware

Compatibility Note

Before ordering, verify:

• 1-1/8" cylinder length

• Existing lock manufacturer

• Required cam style

• Thread compatibility

• Door thickness

• Lock function

• Required finish

Mortise-cylinder cams vary between lock manufacturers and applications, so always confirm the required cam before installation.

Important Cam Note

The correct cam or tailpiece is critical for proper operation.

Depending on the lock, the cylinder may require a compatible:

• Standard cam

• Adams Rite-style cam

• Specialty mortise-lock cam

Do not assume every mortise thumbturn cylinder is interchangeable without confirming the cam configuration.

What's Included

(1) 1-1/8" Brass Mortise Thumb Turn Cylinder