Gibraltar 34039 Locking Knob Handle Plunger 5/8-11

Product Description

The GIBRALTAR 34039 is a locking knob handle plunger with a threaded stud configuration, designed for use in fixturing, clamping, and positioning applications across industrial and trade settings. This plunger features a 5/8-11 thread with a 1 inch thread length and a maximum plunger diameter of 0.311 inches. It delivers an initial end force of 3 pounds and a final end force of 6 pounds, making it suitable for applications that require a controlled, repeatable holding force. The locking element keeps the plunger in the retracted position until released. Installed by machinists, toolmakers, and maintenance technicians, this part suits production jigs, fixtures, and machine tool setups.

The GIBRALTAR 34039 is configured as a knobless threaded stud plunger, intended for installations where a knob is not required or where the stud will be threaded into a custom handle or panel. With a length under head/shoulder of 1.3125 inches, a plunger projection of 0.3125 inches, and a plunger length of 2.186 inches, this plunger fits standard panel-mount or through-hole installations common in industrial tooling and equipment maintenance environments.

Key Features

• Locking element holds plunger in retracted position for hands-free operation
• 5/8-11 thread size with 1 inch thread length for secure panel mounting
• Initial end force of 3 pounds rising to 6 pounds final end force
• Knobless threaded stud design accepts custom handles or direct panel installation
• Maximum plunger diameter of 0.311 inches with a tolerance of +0.001 inches
• Head height of 0.4375 inches (7/16 inch) for low-profile fitment

Compatibility

Designed as an OEM-style replacement or direct-install component for industrial fixtures, jigs, and positioning equipment requiring a 5/8-11 locking plunger with a threaded stud body.

Installation Notes

Installation is typically performed by maintenance technicians or toolmakers using standard hand tools. Ensure the mounting panel or fixture is de-energized and secured before installing or replacing plungers. Thread the stud into the panel to the specified engagement depth and verify the locking element operates freely before returning the assembly to service. Follow applicable facility maintenance and machine safety protocols during installation.