Gibraltar HDLS-1-PT-G Locking Knob Handle Plunger

Product Description

The GIBRALTAR HDLS-1-PT-G is a locking knob handle plunger designed for indexing, positioning, and locking applications in industrial and mechanical assemblies. The plunger features a 1/4-20 thread size with a 0.4-inch thread length and a countersunk knob style that sits flush when fully engaged. Built from steel with a zinc gold chromate finish, it delivers corrosion resistance in light-duty environments. The spring-loaded mechanism provides an initial end force of 1 pound, ramping to a final end force of 4 pounds, giving technicians positive tactile feedback during installation and adjustment. Maintenance techs, machine builders, and millwrights commonly install this type of component during equipment assembly or field service.

This plunger is suited for use in light industrial machinery, enclosures, fixtures, and equipment panels where a fast-acting, hand-operated locking mechanism is needed. The countersunk knob design is particularly useful in tight-clearance layouts where a protruding knob would interfere with adjacent components. The 1/8-inch hex size allows for tool-assisted tightening when hand torque is insufficient. Typical applications include panel latching, slide positioning, and tool-holder indexing in manufacturing and assembly environments.

Key Features

• Locking plunger type with positive lock engagement for secure hold in indexed positions
• 1/4-20 thread size with 0.4-inch thread length for standard tapped-hole installation
• Countersunk knob style suits low-clearance and flush-mount panel applications
• Steel construction with zinc gold chromate finish for light corrosion resistance
• Spring end force range of 1 pound initial to 4 pounds final for consistent tactile feedback
• 1/8-inch hex drive allows tool-assisted installation or removal

Compatibility

Designed as an OEM-style replacement or direct-install locking handle plunger for equipment and fixtures using a standard 1/4-20 tapped mounting hole.

Installation Notes

Installation is performed by threading the plunger body into a 1/4-20 tapped hole by hand, then tightening with a 1/8-inch hex key as needed. Always de-energize or lock out equipment before servicing any indexing or positioning hardware in mechanical assemblies. Verify thread engagement depth against the 0.4-inch thread length to avoid bottoming out in blind holes. Follow applicable machinery safety standards and the equipment manufacturer guidelines during installation.