Vlier PRTL500 Locking Knob Handle Plunger 1/2-13

Product Description

The VLIER PRTL500 is a locking knob handle plunger designed for positioning, indexing, and holding applications in industrial and mechanical assemblies. The plunger features a Delrin knob handle for manual actuation and a steel body with a black finish. It operates with an initial end force of 0.5 pounds and a final end force of 1.75 pounds, making it suitable for light-duty retention tasks. The 1/2-13 thread size allows for straightforward installation into standard threaded holes. This plunger is typically installed by maintenance technicians, machine builders, or fabricators working on jigs, fixtures, and tooling setups.

The PRTL500 is well suited for use in production tooling, fixture plates, and general industrial machinery where a manually operated locking plunger is required. The locking knob style allows the plunger to be retracted and held in the withdrawn position, freeing both hands during workpiece loading and unloading. This makes it a practical choice in repetitive assembly or staging operations where fast part changes are needed.

Key Features

• Locking plunger type allows retraction and hold-back for hands-free operation
• Delrin knob handle provides comfortable manual actuation without tools
• Initial end force of 0.5 pounds rising to a final end force of 1.75 pounds
• 1/2-13 thread size for standard threaded hole installation
• Steel construction with black finish for durability and corrosion resistance
• Compact body length of 1.25 inches suits space-constrained assemblies

Compatibility

Designed as an OEM-style replacement or direct-fit addition for industrial fixtures, jigs, and mechanical assemblies requiring a 1/2-13 threaded locking knob handle plunger.

Installation Notes

Installation is performed by threading the PRTL500 into a prepared 1/2-13 tapped hole using the hex drive on the body. De-energize or lock out any powered equipment before servicing assemblies that contain this plunger. Verify thread engagement depth matches the 1 inch length under head specification to ensure proper seating and force delivery. Do not exceed the rated end force by forcing the plunger beyond its design travel.