Sargent 10-3858 Outside Rose Spring Assembly - For 10X Line

The Sargent 10-3858 is a genuine OEM Outside Rose Spring Assembly specifically engineered for the Sargent 10X Line of heavy-duty cylindrical locks. This precision assembly is the factory-standard replacement part for all 10X series locks and latches manufactured after 2023. Designed to provide the heavy-duty tension required for Grade 1 hardware, the 10-3858 is the direct solution for correcting exterior lever sag and restoring the crisp, horizontal return of the handle.

Institutional Grade Features

• Modern 10X Compatibility: Purpose-built for the updated 10X Line architecture (post-2023 production), ensuring a factory-perfect fit and synchronized mechanical timing.
• Corrects Lever Droop: Replaces fatigued or snapped return springs on the exterior side of the door, preventing "lazy" levers that can compromise ADA compliance and aesthetics.
• Wide Application Range: Compatible with nearly all 10X functions—including entry, classroom, and storeroom—except for functions 07, 08, 15-3, 93, and 94.
• Adjustable Door Thickness: Engineered to function flawlessly on doors ranging from 1-3/8" to 2-1/4" thick, accommodating standard commercial and oversized institutional doors.
• Direct OEM Fit: Maintaining your lock with genuine Sargent parts ensures the continued UL fire-rating and warranty integrity of the 10X chassis.

Technical Specifications

• Manufacturer: Sargent (ASSA ABLOY)
• Model Number: 10-3858
• Series: 10X Line (Post-2023)
  
• Component: Outside Rose Spring Assembly
• Inclusions: Assembly only (Does not include thru bolts)
• Compatibility Note: * For KESO cylinders, use #10-3862 or 10-3864.
  • For ACCENTRA (Yale) LFIC, use #10-3865 or 10-3867

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