Sargent 90 Cylinder Trim Ring - 1/8" Mortise Cylinder Blocking Ring

The Sargent 90 Cylinder Trim Ring (1/8" Thick) is a precision-machined architectural hardware component designed to provide a flush, professional finish for mortise cylinder installations. Often referred to as a blocking ring or cylinder spacer, this 1/8" ring is the primary aesthetic solution for situations where the mortise cylinder body projects slightly from the face of the door. By filling the gap between the cylinder head and the door surface or escutcheon, it prevents the "loose" look of exposed threads and creates a solid, unified assembly that enhances both the security and the visual appeal of the opening.

As a high-performance hardware installation solution, the Sargent #90 ring is specifically engineered for use with Sargent 8200 Series mortise locks, as well as narrow-stile aluminum storefront doors using Adams Rite style locks. In storefront applications, where cylinder lengths often exceed the thickness of the narrow aluminum stile, this 1/8" spacer acts as a structural stabilization solution. It ensures the cylinder is held rigidly against the lock body, preventing the cylinder from wobbling or being easily gripped and twisted by pliers during a forced entry attempt—making it a simple yet effective perimeter security enhancement.

Mechanical Utility & Installation Summary

The Sargent 90 Cylinder Trim Ring serves as a vital bridge between varying door thicknesses and standard cylinder lengths:

• Thread Coverage: Completely conceals exposed cylinder threads, providing a vandal-resistant solution by removing potential leverage points for tampering tools.
• Universal Compatibility: While optimized for Sargent hardware, the 1-3/8" diameter serves as a universal fit solution for almost all standard mortise cylinders from major manufacturers.
• Precision Alignment: Ensures the cylinder cam is positioned at the correct depth to engage the lock’s internal mechanics without binding, acting as a mechanical timing solution.
• Material Integrity: Available in heavy-duty Brass, Bronze, or Stainless Steel, these rings are designed to withstand the high-traffic demands of schools, hospitals, and retail entrances.

Technical Specifications

Engineered Solutions for Door Hardware Professionals

The Sargent #90 1/8" Ring provides targeted solutions for complex field installations:

• Standardized Storefront Solution: Aluminum storefront stiles are typically 1-3/4" thick, but high-security cylinders are often longer. This 1/8" ring is the corrective solution needed to take up the slack and ensure a tight, professional fit.
• Anti-Wobble Security: A cylinder that is not flush against the door can be vibrated or manipulated. This spacer acts as a rigid-mount solution, locking the cylinder in place to maintain the integrity of the Grade 1 mortise lock system.
• Corrosion-Resistant Finishing: Because these rings are made from non-ferrous base materials, they provide a long-term durability solution for exterior-facing doors exposed to salt air or heavy cleaning chemicals.
• Aesthetic Consistency: Available in a wide range of architectural finishes (like Satin Chrome, Dark Bronze, or Bright Brass), the ring provides a design-matching solution that makes the hardware look like a native part of the door's original trim.