Achieve the proper cylinder projection and a clean finished appearance with this 3/8" Cylinder Blocking Collar, available in Satin Chrome or Dark Bronze.

Designed for compatible mortise cylinders, this spacer collar installs behind the cylinder head to take up excess cylinder length when the cylinder extends farther than required from the lock, trim, or mounting surface.

The 3/8" thickness makes this collar ideal for commercial storefront locks, mortise locks, exit-device trim, key switches, and other commercial door-hardware applications where additional cylinder spacing is needed.

Key Features

• 3/8" cylinder blocking collar

• Designed for compatible mortise cylinders

• Helps adjust cylinder projection

• Takes up excess cylinder length

• Provides a clean, professional finished appearance

• Easy installation

• Commercial-duty door hardware accessory

• Suitable for replacement and new installations

• Available in Satin Chrome or Dark Bronze

• Ideal for commercial lock and storefront applications

Available Finishes

Satin Chrome

Clean commercial finish that coordinates with common satin-chrome and stainless architectural door hardware.

Dark Bronze

Dark architectural finish designed to coordinate with bronze storefront and commercial door hardware.

What Is a Blocking Collar Used For?

Mortise cylinders are available in several lengths. Depending on the thickness of the lock, trim, door, or mounting surface, a cylinder may extend farther from the hardware than desired.

A blocking collar installs behind the cylinder head to take up the extra space and help position the cylinder correctly.

The 3/8" collar adds approximately 3/8" of spacing between the cylinder head and the mounting surface.

Common Applications

• Mortise locks

• Storefront deadlocks

• Storefront deadlatches

• Exit-device trim

• Key switches

• Access-control hardware

• Electric door controls

• Commercial locksets

• Commercial security hardware

Product Specifications

Product Type: Cylinder Blocking Collar / Spacer
Thickness: 3/8"
Application: Compatible Mortise Cylinders
Available Finishes: Satin Chrome or Dark Bronze
Use: Cylinder Spacing / Projection Adjustment
Sale Unit: Each

Important Ordering Information

This listing is for the blocking collar only.

Mortise cylinder, lock body, keys, cams, thumbturns, and other door hardware are not included unless specifically stated.

Before ordering, verify:

• Required spacer thickness

• Mortise cylinder diameter

• Cylinder length

• Lock or trim configuration

• Required architectural finish