Gibraltar 34240 Locking Plunger 5/8-11 Threaded Stud Steel

Product Description

The GIBRALTAR 34240 is a locking knob-style plunger with a knobless threaded stud design, intended for use in positioning, clamping, and indexing applications across industrial and mechanical assemblies. The plunger features a 5/8-11 external thread with a 1-inch thread length and delivers an initial end force of 5 pounds, ramping to a final end force of 10 pounds at full engagement. The maximum plunger diameter is 0.373 inches with a diameter tolerance of plus 0.001 inches. Constructed from steel with a zinc-plated finish, this plunger is suited for use in shop fixtures, jigs, machine tool setups, and fabrication environments where a secure, repeatable locking position is required.

This plunger is commonly installed in manufacturing fixtures, workholding equipment, and mechanical assemblies where controlled spring force and positive locking are needed. The knobless threaded stud configuration allows it to be actuated with a separate handle or integrated directly into a panel or plate. The stud thread size is 1/2-13, and the length under head or shoulder measures 1.3125 inches. A plunger projection of 0.3125 inches provides consistent engagement depth in typical indexing or detent applications. Machinists, tool-and-die technicians, and industrial maintenance professionals are the primary installers of this component.

Key Features

• Locking plunger design with positive locking element for secure hold at indexed positions
• 5/8-11 external thread with 1-inch thread length for standard fixture integration
• Initial end force of 5 pounds, final end force of 10 pounds for controlled spring engagement
• Knobless threaded stud (1/2-13) allows flush or recessed installation
• Steel construction with zinc-plated finish for corrosion resistance in shop environments
• Plunger diameter tolerance of plus 0.001 inches for precise fit in bored holes

Compatibility

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

Installation Notes

Installation is typically performed by machinists or industrial maintenance technicians using standard hand tools. Ensure the mating threaded bore is clean and free of debris before threading the plunger into position. Verify that the plunger hole diameter in the receiving workpiece matches the maximum plunger diameter of 0.373 inches within the specified tolerance before assembly. Do not exceed the rated end force by using additional mechanical advantage on the locking element.