Sargent 90 Cylinder Trim Ring - 3/8" Mortise Cylinder Blocking Ring

The Sargent 90 Cylinder Trim Ring (3/8" Thick) is a robust architectural hardware spacing solution designed for high-profile commercial and institutional door openings. As the thickest standard option in the Sargent #90 series, this 3/8" blocking ring is the primary aesthetic and security solution for installations where a mortise cylinder extends significantly beyond the door face. This typically occurs when using high-security long-bodied cylinders or when mounting standard hardware on thinner-than-average door stiles. By filling this gap, the ring creates a flush, intentional appearance that eliminates exposed threads and reinforces the cylinder’s position.

Beyond aesthetics, the Sargent #90 3/8" ring is a critical vandal-resistant solution. On aluminum storefront doors or heavy-duty Sargent 8200 Series mortise locks, an over-extended cylinder is a major security vulnerability; it provides a "lip" that can be gripped by wrenches to snap the cylinder or bypass the lock. This 3/8" ring acts as a structural stabilization solution, filling the void to ensure the cylinder head sits tight against a solid surface. This eliminates mechanical "play" and ensures the internal cam remains perfectly aligned with the lock's hub for consistent, fail-safe operation.

Mechanical Utility & Installation Summary

The Sargent 90 blocking ring serves as a vital bridge between the door's exterior trim and the lock's internal mechanics:

• Thread Concealment: Completely masks the brass threading of long cylinders, providing a corrosion-protection solution for exterior-facing hardware.
• Universal Application: Featuring a standard 1-3/8" diameter, it serves as a universal hardware solution compatible with Sargent, Adams Rite, Yale, and other major mortise cylinder brands.
  
• Leverage Reduction: By removing the gap between the door and the cylinder head, it provides a security-hardening solution that prevents unauthorized removal or physical tampering.
• Material Integrity: Precision-crafted from Solid Brass, Bronze, or Stainless Steel, ensuring it meets the durability requirements of Grade 1 commercial hardware.

Technical Specifications

Engineered Solutions for Complex Door Prep

The Sargent #90 3/8" Ring provides professional answers to challenging architectural hardware hurdles:

• High-Security Cylinder Adaptation: Proprietary high-security cores (like Sargent Degree or Signature) often require longer housings. This 3/8" ring is the corrective solution needed to install these advanced cylinders on standard 1-3/4" doors without them protruding dangerously.
• Narrow-Stile Storefront Security: Aluminum doors often have very thin profiles. When a standard 1-1/8" cylinder is used, the 3/8" ring acts as the perfect-fit solution, shimming the cylinder so the cam reaches the lock without over-penetrating.
• Aesthetic Consistency: Available in a full range of architectural finishes (Satin Chrome, Dark Bronze, Bright Brass), the ring provides a seamless design solution that makes the spacer look like an original part of the escutcheon or rose.
  
• Retrofit Problem-Solving: When replacing older, thinner locksets with modern heavy-duty versions, this ring acts as a flexible retrofit solution, allowing technicians to reuse existing cylinders while maintaining a professional, tight-to-the-door look.
• Weather and Debris Barrier: By closing the gap around the cylinder, the ring acts as a protective solution, preventing moisture and grit from entering the door's mortise pocket and causing internal lock failure.