Gibraltar HDLS-1-G Locking Knob Handle Plunger 1/4-20

Product Description

The GIBRALTAR HDLS-1-G is a locking knob handle plunger designed for use in positioning, indexing, and clamping applications across industrial and mechanical assemblies. The unit features a 1/4-20 threaded body with a 0.4-inch thread length and a countersunk knob style for low-profile installations. The spring-loaded steel plunger delivers 1 pound of initial end force rising to 4 pounds of final end force, providing reliable hold in engaged positions. Finished in zinc gold chromate for corrosion resistance, this plunger is suited for installation by maintenance technicians and machine builders working on fixtures, panels, and equipment housings.

This plunger fits into threaded mounting holes in machine frames, enclosures, jigs, and fixture plates where a hand-operated locking mechanism is needed. The countersunk knob keeps the head flush or near-flush with the surrounding surface, reducing snag points in tight assemblies. With a maximum plunger diameter of 0.123 inches and a plunger projection of 0.125 inches, it is intended for light-duty indexing and positioning tasks in industrial environments.

Key Features

• 1/4-20 threaded body with 0.4-inch thread length for standard tapped hole installation
• Spring end force range: 1 pound initial to 4 pounds final for consistent positioning hold
• Countersunk knob style provides a low-profile, snag-resistant head design
• Steel construction with zinc gold chromate finish for corrosion resistance
• 0.125-inch plunger projection and 0.123-inch maximum plunger diameter for light-duty indexing
• 1/8-inch hex drive for installation and adjustment with a standard hex key

Compatibility

Designed as a direct-fit locking knob handle plunger for applications requiring a 1/4-20 threaded mounting hole and a spring-loaded indexing or positioning function in light-duty industrial assemblies.

Installation Notes

Installation requires a properly tapped 1/4-20 threaded hole in the mounting surface. Use a 1/8-inch hex key to seat and torque the plunger body into the thread. Ensure the mating index hole or detent groove is aligned with the plunger tip before final tightening. Power down or de-energize any associated equipment before servicing assemblies containing this component.