Gibraltar HDLS-4-G Locking Knob Handle Plunger 1/2-13

Product Description

The GIBRALTAR HDLS-4-G is a locking knob handle plunger designed for precision positioning and retention applications in industrial and mechanical assemblies. This plunger features a 1/2-13 thread with a 0.65-inch thread length and a countersunk knob style, making it well suited for flush or recessed mounting configurations. It delivers an initial end force of 1 pound rising to a final end force of 10 pounds, providing reliable spring-loaded holding force. The plunger diameter measures 0.248 inches at maximum with a plunger projection of 0.25 inches. Machinists, millwrights, and maintenance technicians working with tooling fixtures, jigs, and machine panels are the primary installers of this component.

The HDLS-4-G fits applications where a locking, spring-loaded plunger is needed to index or secure a moving component in a fixed position. Common uses include fixture alignment, panel retention, and tooling setups in manufacturing and industrial maintenance environments. The countersunk knob design allows the plunger to seat flush with surrounding surfaces when not engaged, reducing snag hazards in moving assemblies. This plunger is sold individually and is appropriate for both light-duty and moderate-force retention tasks where repeatable positioning is required.

Key Features

• Locking plunger type with countersunk knob style for flush mounting
• 1/2-13 thread size with 0.65-inch thread length for secure installation
• Spring end force range from 1 pound initial to 10 pounds final
• Maximum plunger diameter of 0.248 inches with 0.25-inch plunger projection
• Plunger length of 1.38 inches and head diameter of 1.25 inches
• Compact and lightweight at 0.13 pounds for use in space-constrained assemblies

Compatibility

Designed as a direct-fit locking knob handle plunger for industrial fixtures, jigs, tooling panels, and mechanical assemblies requiring 1/2-13 threaded plunger retention hardware.

Installation Notes

Installation is typically performed by machinists or maintenance technicians using standard hand tools. Ensure the receiving bore and threaded hole are clean and free of debris before installation. Disengage any retained components and relieve any spring load before removing or replacing the plunger. Verify thread engagement depth does not bottom out the plunger travel before final installation.