Vlier PRT500P Non-locking Knob Handle Plunger 1/2-13

Product Description

The VLIER PRT500P is a non-locking knob handle plunger designed for indexing, positioning, and clamping applications in industrial and mechanical assemblies. Threaded at 1/2-13, it features a Delrin knob for tool-free hand operation and delivers an initial end force of 0.5 pounds ramping to a final end force of 1.75 pounds. The spring-loaded plunger has a maximum diameter of 0.31 inches and a projection of 0.25 inches. A locking element is incorporated into the body. Licensed trades and machine maintenance technicians install this type of plunger into fixtures, jigs, and panel assemblies where repeatable positioning is required.

The PRT500P suits light-duty positioning tasks in manufacturing fixtures, enclosures, machine guards, and tooling plates. Its non-locking plunger style allows smooth, rapid engagement and release without tools. The Delrin knob resists wear and reduces operator fatigue in high-cycle environments. The 1/2-13 thread makes it compatible with standard tapped holes in steel, aluminum, and plastic assemblies across general industrial applications.

Key Features

• Non-locking plunger type for quick, tool-free engagement and release
• Delrin knob provides durable, comfortable hand operation
• Spring end force range of 0.5 pounds initial to 1.75 pounds final
• 1/2-13 thread fits standard tapped holes in common industrial materials
• Locking element included in body assembly
• Compact body length of 1.25 inches suits space-constrained installations

Compatibility

Designed as an OEM-style replacement or direct-install plunger for industrial fixtures, jigs, enclosures, and tooling assemblies using standard 1/2-13 tapped holes.

Installation Notes

Installation is performed by threading the PRT500P into a pre-tapped 1/2-13 hole by hand or with a wrench applied to the hex. Ensure the mating hole thread is clean and free of debris before installation. Do not overtighten, as this can compress the internal spring mechanism and affect end force performance. Verify plunger projection clearance before finalizing assembly.