Sargent 687-12 Vertical Rod Extension Kit | 12" Length

The Sargent 687-12 is a specialized hardware component designed for use with Sargent 8700 and NB8700 Series Surface Vertical Rod (SVR) Exit Devices. When your door exceeds standard heights, this 12-inch extension provides the necessary reach to connect the center chassis to the top latch assembly. Engineered for seamless integration, the 687-12 ensures that your life-safety hardware remains fully functional and code-compliant on tall or oversized doors.

Precision Engineering & Seamless Installation

• Universal 8700 Compatibility: Specifically engineered for the Sargent 8700 (Surface Vertical Rod) and NB8700 (No Bottom Rod) series, ensuring perfect mechanical timing.
  
• 12-Inch Extended Reach: Provides exactly one foot of additional rod length, ideal for 8-foot, 9-foot, or custom-height door openings.
• Screw-On Connectivity: Features precision-threaded ends for a secure "screw-on" application. This design maintains the structural rigidity of the rod without the need for field welding or specialized tools.
  
• Smooth Mechanical Operation: Manufactured to match the original rod's diameter and weight, ensuring the internal springs and gravity-assisted latches operate with factory-spec tension.
• Durable Construction: Built from high-strength architectural materials to resist bending and vibration in high-traffic commercial environments.

Technical Specifications

• Model Number: 687-12
• Part Type: Vertical Rod Extension Kit
• Extension Length: 12 Inches (1' foot)
  
• Application: Surface Vertical Rods (SVR)
• Compatibility: Sargent 8700 & NB8700 Series
• Connection Type: Screw-on Threaded Extension

The Sargent 687-12 is essential for meeting fire and life-safety codes on oversized doors. If the top latch of your exit device does not engage because the rod is too short, this extension is the only factory-approved solution. When installing, we recommend a small drop of medium-strength thread locker on the screw-on joint to prevent loosening over time due to the constant vibration of the door closing.

Installation Note: After adding the extension, ensure you adjust the top rod according to the Sargent installation template. Proper "timing" is critical; if the rod is too long or too short, the latch may not fully retract, leading to door dragging or security failures. For high-security installations, verify that the rod guides are properly spaced and secured with thru bolts to prevent the extended rod from bowing.