Sargent 10-3859 Inside Rose Spring Assembly - For 10X Line

The Sargent 10-3859 is a genuine OEM Inside 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. If your interior door handle has begun to droop or feels "mushy" during operation, replacing the 10-3859 is the direct mechanical fix to restore that "snap-back" horizontal alignment and Grade 1 performance.

Institutional Grade Features

• Modern 10X Compatibility: Exclusively designed for the updated 10X Line architecture (post-2023 production), ensuring perfect mechanical timing and tension.
  
• Eliminates Lever Sag: The primary solution for correcting interior lever droop, which is often caused by fatigued or broken return springs in high-traffic environments.
  
• Broad Function Support: Engineered to work seamlessly with a wide range of Sargent functions, including:
  • Standard & Entry: 04, 05, 13, 14, 15, 15-3, 24, 37
    
  • Privacy & Specialized: 44, 50, 53, 54, 60, 64, 65, 68
• Versatile Door Thickness: Calibrated for use on doors ranging from 1-3/8" to 2-1/4" thick, making it ideal for both standard commercial and thick-door institutional applications.
  
• Direct OEM Fit: As a factory-certified part, it maintains the UL listing and ADA compliance of your original Sargent hardware.

Technical Specifications

• Manufacturer: Sargent (ASSA ABLOY)
• Model Number: 10-3859
• Series: 10X Line (Post-2023)
• Component: Inside Rose Spring Assembly

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